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<!-- DFIN ActiveDisclosure(SM) XBRL Linkbase Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2022-03-29T21:14:32.1194927+00:00 -->
<!-- Version            : 5.0.1.728 -->
<!-- Package ID         : 213a87ea1caf4a588bed8555a95bd074 -->
<!-- Copyright (c) 2022 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityFileNumber" xlink:type="locator" xlink:label="dei_EntityFileNumber" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityFileNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity File Number</link:label>
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityTaxIdentificationNumber" xlink:type="locator" xlink:label="dei_EntityTaxIdentificationNumber" />
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityIncorporationStateCountryCode" xlink:type="locator" xlink:label="dei_EntityIncorporationStateCountryCode" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Incorporation, State or Country Code</link:label>
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressAddressLine1" xlink:type="locator" xlink:label="dei_EntityAddressAddressLine1" />
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressCityOrTown" xlink:type="locator" xlink:label="dei_EntityAddressCityOrTown" />
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityAddressStateOrProvince" xlink:type="locator" xlink:label="dei_EntityAddressStateOrProvince" />
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    <link:label xml:lang="en-US" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address State Or Province</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityPublicFloat" xlink:type="locator" xlink:label="dei_EntityPublicFloat" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityPublicFloat_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Public Float</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_EntityPublicFloat_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Entity Public Float</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_Security12bTitle" xlink:type="locator" xlink:label="dei_Security12bTitle" />
    <link:label xml:lang="en-US" xlink:label="dei_Security12bTitle_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Title of 12(b) Security</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_Security12bTitle_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Security12b Title</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_SecurityExchangeName" xlink:type="locator" xlink:label="dei_SecurityExchangeName" />
    <link:label xml:lang="en-US" xlink:label="dei_SecurityExchangeName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security Exchange Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SecurityExchangeName" xlink:to="dei_SecurityExchangeName_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_SecurityExchangeName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_CityAreaCode" xlink:type="locator" xlink:label="dei_CityAreaCode" />
    <link:label xml:lang="en-US" xlink:label="dei_CityAreaCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">City Area Code</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_CityAreaCode_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LocalPhoneNumber" xlink:type="locator" xlink:label="dei_LocalPhoneNumber" />
    <link:label xml:lang="en-US" xlink:label="dei_LocalPhoneNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Local Phone Number</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_LocalPhoneNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Local Phone Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityInteractiveDataCurrent" xlink:type="locator" xlink:label="dei_EntityInteractiveDataCurrent" />
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_IcfrAuditorAttestationFlag" xlink:type="locator" xlink:label="dei_IcfrAuditorAttestationFlag" />
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_DocumentsIncorporatedByReferenceTextBlock" xlink:type="locator" xlink:label="dei_DocumentsIncorporatedByReferenceTextBlock" />
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_AuditorFirmId" xlink:type="locator" xlink:label="dei_AuditorFirmId" />
    <link:label xml:lang="en-US" xlink:label="dei_AuditorFirmId_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Auditor Firm ID</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_AuditorFirmId_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Firm Id</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_AuditorName" xlink:type="locator" xlink:label="dei_AuditorName" />
    <link:label xml:lang="en-US" xlink:label="dei_AuditorName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Auditor Name</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_AuditorName_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Name</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_AuditorLocation" xlink:type="locator" xlink:label="dei_AuditorLocation" />
    <link:label xml:lang="en-US" xlink:label="dei_AuditorLocation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Auditor Location</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AuditorLocation" xlink:to="dei_AuditorLocation_lbl" />
    <link:label xml:lang="en-US" xlink:label="dei_AuditorLocation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Auditor Location</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:type="locator" xlink:label="us-gaap_StatementOfFinancialPositionAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Of Financial Position [Abstract]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Table]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Table]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Line Items]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current assets:</link:label>
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    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_ChangeInRedemptionValueOfNoncontrollingInterest" xlink:type="locator" xlink:label="vtvt_ChangeInRedemptionValueOfNoncontrollingInterest" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:type="locator" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Equity Component [Domain]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:type="locator" xlink:label="us-gaap_AdditionalPaidInCapitalMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional Paid-in Capital [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid In Capital [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:type="locator" xlink:label="us-gaap_RetainedEarningsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Deficit [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_RedeemableNoncontrollingInterestsMember" xlink:type="locator" xlink:label="vtvt_RedeemableNoncontrollingInterestsMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_RedeemableNoncontrollingInterestsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Redeemable noncontrolling interests.</link:label>
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    <link:label xml:lang="en-US" xlink:label="vtvt_RedeemableNoncontrollingInterestsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redeemable Noncontrolling Interest [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_RedeemableNoncontrollingInterestsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Redeemable Noncontrolling Interests [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning balance</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests" xlink:type="locator" xlink:label="us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning balance, redeemable noncontrolling interest</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning balance, shares</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net loss</link:label>
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    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_IssuanceOfClassACommonStockUnderATMOffering" xlink:type="locator" xlink:label="vtvt_IssuanceOfClassACommonStockUnderATMOffering" />
    <link:label xml:lang="en-US" xlink:label="vtvt_IssuanceOfClassACommonStockUnderATMOffering_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of Class A Common Stock under ATM offering</link:label>
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    <link:label xml:lang="en-US" xlink:label="vtvt_IssuanceOfClassACommonStockUnderATMOffering_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Class A Common Stock Under A T M Offering</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_IssuanceOfClassACommonStockUnderATMOfferingShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of Class A common stock under ATM offering shares</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_IssuanceOfClassACommonStockUnderATMOfferingShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Class A Common Stock Under A T M Offering Shares</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Stock Options Exercised</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise of stock options, shares</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:to="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Stock Options Exercised</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_IssuanceOfClassACommonStockUnderLPCAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of Class A Common Stock under LPC Agreement</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_IssuanceOfClassACommonStockUnderLPCAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Class A Common Stock Under L P C Agreement</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_IssuanceOfClassACommonStockUnderLPCAgreementShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of Class A Common Stock under LPC agreement shares</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_IssuanceOfClassACommonStockUnderLPCAgreementShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Class A Common Stock Under L P C Agreement Shares</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_StockIssuedDuringPeriodValueVestingOfRestrictedStockUnits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting of restricted stock units</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_StockIssuedDuringPeriodValueVestingOfRestrictedStockUnits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value Vesting Of Restricted Stock Units</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_StockIssuedDuringPeriodSharesVestingOfRestrictedStockUnits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting of restricted stock units, shares</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_StockIssuedDuringPeriodSharesVestingOfRestrictedStockUnits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Shares Vesting Of Restricted Stock Units</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MinorityInterestChangeInRedemptionValue" xlink:type="locator" xlink:label="us-gaap_MinorityInterestChangeInRedemptionValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MinorityInterestChangeInRedemptionValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in redemption value of noncontrolling interest</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinorityInterestChangeInRedemptionValue" xlink:to="us-gaap_MinorityInterestChangeInRedemptionValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MinorityInterestChangeInRedemptionValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minority Interest Change In Redemption Value</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ChangeInRedemptionValueOfNoncontrollingInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in redemption value of noncontrolling interest</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ChangeInRedemptionValueOfNoncontrollingInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Change In Redemption Value Of Noncontrolling Interest</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending balance</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending balance, redeemable noncontrolling interest</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending balance, shares</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_ChangeInFairValueOfWarrantsRelatedParty" xlink:type="locator" xlink:label="vtvt_ChangeInFairValueOfWarrantsRelatedParty" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ChangeInFairValueOfWarrantsRelatedParty_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Change in fair value of warrants related party.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_ChangeInFairValueOfWarrantsRelatedParty" xlink:to="vtvt_ChangeInFairValueOfWarrantsRelatedParty_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_IncreaseDecreaseInLongTermDeposits" xlink:type="locator" xlink:label="vtvt_IncreaseDecreaseInLongTermDeposits" />
    <link:label xml:lang="en-US" xlink:label="vtvt_IncreaseDecreaseInLongTermDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Increase decrease in long-term deposits.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_IncreaseDecreaseInLongTermDeposits" xlink:to="vtvt_IncreaseDecreaseInLongTermDeposits_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_AccretedInterestOnDebt" xlink:type="locator" xlink:label="vtvt_AccretedInterestOnDebt" />
    <link:label xml:lang="en-US" xlink:label="vtvt_AccretedInterestOnDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Accreted interest on debt.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_AccretedInterestOnDebt" xlink:to="vtvt_AccretedInterestOnDebt_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_ProceedsFromIssuanceOfCommonStockToRelatedParty" xlink:type="locator" xlink:label="vtvt_ProceedsFromIssuanceOfCommonStockToRelatedParty" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ProceedsFromIssuanceOfCommonStockToRelatedParty_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from issuance of common stock to related party.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_ProceedsFromIssuanceOfCommonStockToRelatedParty" xlink:to="vtvt_ProceedsFromIssuanceOfCommonStockToRelatedParty_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_LeaseholdImprovementsObtainedInExchangeForLeaseObligations" xlink:type="locator" xlink:label="vtvt_LeaseholdImprovementsObtainedInExchangeForLeaseObligations" />
    <link:label xml:lang="en-US" xlink:label="vtvt_LeaseholdImprovementsObtainedInExchangeForLeaseObligations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Leasehold improvements obtained in exchange for lease obligations.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_LeaseholdImprovementsObtainedInExchangeForLeaseObligations" xlink:to="vtvt_LeaseholdImprovementsObtainedInExchangeForLeaseObligations_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_IssuanceOfLetterAgreementAndWarrantsToPurchaseCommonStockToRelatedParty" xlink:type="locator" xlink:label="vtvt_IssuanceOfLetterAgreementAndWarrantsToPurchaseCommonStockToRelatedParty" />
    <link:label xml:lang="en-US" xlink:label="vtvt_IssuanceOfLetterAgreementAndWarrantsToPurchaseCommonStockToRelatedParty_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of letter agreement and warrants to purchase common stock to related party.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_IssuanceOfLetterAgreementAndWarrantsToPurchaseCommonStockToRelatedParty" xlink:to="vtvt_IssuanceOfLetterAgreementAndWarrantsToPurchaseCommonStockToRelatedParty_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:type="locator" xlink:label="us-gaap_StatementOfCashFlowsAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Of Cash Flows [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_StatementOfCashFlowsAbstract_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from operating activities:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Operating Activities [Abstract]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProfitLoss_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net loss before noncontrolling interest</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to reconcile net loss before noncontrolling interest to net cash used in operating activities:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:type="locator" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">(Gain) on disposal of property and equipment, net</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:to="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_GainLossOnSaleOfPropertyPlantEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Gain Loss On Sale Of Property Plant Equipment</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Depreciation" xlink:type="locator" xlink:label="us-gaap_Depreciation" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Depreciation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Depreciation" xlink:to="us-gaap_Depreciation_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_Depreciation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensation" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based compensation expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensation" xlink:to="us-gaap_ShareBasedCompensation_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:type="locator" xlink:label="us-gaap_UnrealizedGainLossOnInvestments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnrealizedGainLossOnInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Change in fair value of investments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrealizedGainLossOnInvestments" xlink:to="us-gaap_UnrealizedGainLossOnInvestments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnrealizedGainLossOnInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Unrealized Gain Loss On Investments</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ChangeInFairValueOfWarrantsRelatedParty_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value of warrants, related party</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ChangeInFairValueOfWarrantsRelatedParty_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Change In Fair Value Of Warrants Related Party</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AmortizationOfDebtDiscountPremium" xlink:type="locator" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of debt discount</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfDebtDiscountPremium" xlink:to="us-gaap_AmortizationOfDebtDiscountPremium_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Amortization Of Debt Discount Premium</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Changes in assets and liabilities:</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Operating Capital [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accounts receivable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:to="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Accounts Receivable</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Prepaid expenses and other assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:to="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Prepaid Deferred Expense And Other Assets</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_IncreaseDecreaseInLongTermDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Long-term deposits</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_IncreaseDecreaseInLongTermDeposits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Long Term Deposits</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable and accrued expenses</link:label>
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    <link:label xml:lang="en-US" xlink:label="vtvt_AccretedInterestOnDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accreted interest on debt</link:label>
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash provided by investing activities</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Investing Activities</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash flows from financing activities:</link:label>
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    <link:label xml:lang="en-US" xlink:label="vtvt_ProceedsFromIssuanceOfCommonStockToRelatedParty_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of Class A Common Stock to a related party under the Letter Agreements</link:label>
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:type="locator" xlink:label="us-gaap_ProceedsFromStockOptionsExercised" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash provided by financing activities</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Net Cash Provided By Used In Financing Activities</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:type="locator" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestPaidNet" xlink:type="locator" xlink:label="us-gaap_InterestPaidNet" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:type="locator" xlink:label="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability" xlink:type="locator" xlink:label="us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability" />
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    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_VariableInterestsAndEquityMethodInvestmentsDisclosureAbstract" xlink:type="locator" xlink:label="vtvt_VariableInterestsAndEquityMethodInvestmentsDisclosureAbstract" />
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    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_LegalEntityAxis" xlink:type="locator" xlink:label="dei_LegalEntityAxis" />
    <link:label xml:lang="en-US" xlink:label="dei_LegalEntityAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Legal Entity</link:label>
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    <link:label xml:lang="en-US" xlink:label="dei_LegalEntityAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Legal Entity [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd#dei_EntityDomain" xlink:type="locator" xlink:label="dei_EntityDomain" />
    <link:label xml:lang="en-US" xlink:label="dei_EntityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity</link:label>
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    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_VTvLLCMember" xlink:type="locator" xlink:label="vtvt_VTvLLCMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_VTvLLCMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">vTv LLC.</link:label>
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    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_CantorFitzgeraldMember" xlink:type="locator" xlink:label="vtvt_CantorFitzgeraldMember" />
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    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_LicenseAgreementObligationsAxis" xlink:type="locator" xlink:label="vtvt_LicenseAgreementObligationsAxis" />
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    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_LPCPurchaseAgreementMember" xlink:type="locator" xlink:label="vtvt_LPCPurchaseAgreementMember" />
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    <link:label xml:lang="en-US" xlink:label="vtvt_PercentageOfNonVotingEconomicInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of non-voting economic interest of vTv Therapeutics Holdings LLC in vTv LLC</link:label>
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    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_RemainingAvailabilityStockIssuedDuringPeriodValueNewIssues" xlink:type="locator" xlink:label="vtvt_RemainingAvailabilityStockIssuedDuringPeriodValueNewIssues" />
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:type="locator" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" />
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    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_NumberOfCustomers" xlink:type="locator" xlink:label="vtvt_NumberOfCustomers" />
    <link:label xml:lang="en-US" xlink:label="vtvt_NumberOfCustomers_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of customers.</link:label>
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    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_SummaryOfSignificantAccountingPoliciesLineItems" xlink:type="locator" xlink:label="vtvt_SummaryOfSignificantAccountingPoliciesLineItems" />
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    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_SummaryOfSignificantAccountingPoliciesTable" xlink:type="locator" xlink:label="vtvt_SummaryOfSignificantAccountingPoliciesTable" />
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    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis" xlink:type="locator" xlink:label="srt_RangeAxis" />
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    <link:label xml:lang="en-US" xlink:label="srt_RangeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Range [Axis]</link:label>
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    <link:label xml:lang="en-US" xlink:label="srt_RangeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</link:label>
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    <link:label xml:lang="en-US" xlink:label="srt_RangeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Range [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember" xlink:type="locator" xlink:label="srt_MinimumMember" />
    <link:label xml:lang="en-US" xlink:label="srt_MinimumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:label="srt_MinimumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:label="srt_MaximumMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum [Member]</link:label>
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NumberOfOperatingSegments" xlink:type="locator" xlink:label="us-gaap_NumberOfOperatingSegments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of operating segments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NumberOfOperatingSegments" xlink:to="us-gaap_NumberOfOperatingSegments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Operating Segments</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_LicenseFeeReceived" xlink:type="locator" xlink:label="vtvt_LicenseFeeReceived" />
    <link:label xml:lang="en-US" xlink:label="vtvt_LicenseFeeReceived_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">License fee received.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_LicenseFeeReceived" xlink:to="vtvt_LicenseFeeReceived_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_PotentialDevelopmentAndRegulatoryMilestonePaymentsReceivable" xlink:type="locator" xlink:label="vtvt_PotentialDevelopmentAndRegulatoryMilestonePaymentsReceivable" />
    <link:label xml:lang="en-US" xlink:label="vtvt_PotentialDevelopmentAndRegulatoryMilestonePaymentsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Potential development and regulatory milestone payments receivable.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_PotentialDevelopmentAndRegulatoryMilestonePaymentsReceivable" xlink:to="vtvt_PotentialDevelopmentAndRegulatoryMilestonePaymentsReceivable_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable" xlink:to="us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TypeOfArrangementAxis" xlink:type="locator" xlink:label="us-gaap_TypeOfArrangementAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collaborative Arrangement and Arrangement Other than Collaborative</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TypeOfArrangementAxis" xlink:to="us-gaap_TypeOfArrangementAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Type Of Arrangement [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:type="locator" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collaborative Arrangement and Arrangement Other than Collaborative</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:to="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Arrangements And Nonarrangement Transactions [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CollaborativeArrangementMember" xlink:type="locator" xlink:label="us-gaap_CollaborativeArrangementMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CollaborativeArrangementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collaborative Arrangements [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CollaborativeArrangementMember" xlink:to="us-gaap_CollaborativeArrangementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CollaborativeArrangementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_ReneoPharmaceuticalsIncMember" xlink:type="locator" xlink:label="vtvt_ReneoPharmaceuticalsIncMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ReneoPharmaceuticalsIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Reneo Pharmaceuticals Inc.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_ReneoPharmaceuticalsIncMember" xlink:to="vtvt_ReneoPharmaceuticalsIncMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ReneoPharmaceuticalsIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reneo [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ReneoPharmaceuticalsIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Reneo Pharmaceuticals Inc [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_HangzhouZhongmeiHuadongPharmaceuticalCompanyLimitedMember" xlink:type="locator" xlink:label="vtvt_HangzhouZhongmeiHuadongPharmaceuticalCompanyLimitedMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_HangzhouZhongmeiHuadongPharmaceuticalCompanyLimitedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Hangzhou Zhongmei Huadong Pharmaceutical Company Limited.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_HangzhouZhongmeiHuadongPharmaceuticalCompanyLimitedMember" xlink:to="vtvt_HangzhouZhongmeiHuadongPharmaceuticalCompanyLimitedMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_HangzhouZhongmeiHuadongPharmaceuticalCompanyLimitedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Hangzhou Zhongmei Huadong Pharmaceutical Co., Ltd. [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_HangzhouZhongmeiHuadongPharmaceuticalCompanyLimitedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Hangzhou Zhongmei Huadong Pharmaceutical Company Limited [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherCommitmentsAxis" xlink:type="locator" xlink:label="us-gaap_OtherCommitmentsAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherCommitmentsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Commitments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherCommitmentsAxis" xlink:to="us-gaap_OtherCommitmentsAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherCommitmentsAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Commitments [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherCommitmentsDomain" xlink:type="locator" xlink:label="us-gaap_OtherCommitmentsDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherCommitmentsDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Commitments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherCommitmentsDomain" xlink:to="us-gaap_OtherCommitmentsDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherCommitmentsDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Commitments [Domain]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_PhaseTwoMultiRegionalClinicalTrialMember" xlink:type="locator" xlink:label="vtvt_PhaseTwoMultiRegionalClinicalTrialMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_PhaseTwoMultiRegionalClinicalTrialMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Phase two multi-regional clinical trial.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_PhaseTwoMultiRegionalClinicalTrialMember" xlink:to="vtvt_PhaseTwoMultiRegionalClinicalTrialMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_PhaseTwoMultiRegionalClinicalTrialMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Phase 2 MRCT [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_PhaseTwoMultiRegionalClinicalTrialMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Phase Two Multi Regional Clinical Trial [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis" xlink:type="locator" xlink:label="srt_ProductOrServiceAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ProductOrServiceAxis" xlink:to="srt_ProductOrServiceAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Product Or Service [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain" xlink:type="locator" xlink:label="srt_ProductsAndServicesDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Product and Service</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ProductsAndServicesDomain" xlink:to="srt_ProductsAndServicesDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Products And Services [Domain]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_LicenseAndTechnologyTransferServicesOfChemistryAndManufacturingKnowHowMember" xlink:type="locator" xlink:label="vtvt_LicenseAndTechnologyTransferServicesOfChemistryAndManufacturingKnowHowMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_LicenseAndTechnologyTransferServicesOfChemistryAndManufacturingKnowHowMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">License and technology transfer services of chemistry and manufacturing know-how.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_LicenseAndTechnologyTransferServicesOfChemistryAndManufacturingKnowHowMember" xlink:to="vtvt_LicenseAndTechnologyTransferServicesOfChemistryAndManufacturingKnowHowMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_LicenseAndTechnologyTransferServicesOfChemistryAndManufacturingKnowHowMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License and Technology Transfer Services of Chemistry and Manufacturing Know-How [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_LicenseAndTechnologyTransferServicesOfChemistryAndManufacturingKnowHowMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">License And Technology Transfer Services Of Chemistry And Manufacturing Know How [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_JointDevelopmentCommitteeMember" xlink:type="locator" xlink:label="vtvt_JointDevelopmentCommitteeMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_JointDevelopmentCommitteeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Joint development committee.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_JointDevelopmentCommitteeMember" xlink:to="vtvt_JointDevelopmentCommitteeMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_JointDevelopmentCommitteeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Joint Development Committee [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_JointDevelopmentCommitteeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Joint Development Committee [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_NewsoaraBiopharmaCoLtdMember" xlink:type="locator" xlink:label="vtvt_NewsoaraBiopharmaCoLtdMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_NewsoaraBiopharmaCoLtdMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Newsoara Biopharma Co Ltd.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_NewsoaraBiopharmaCoLtdMember" xlink:to="vtvt_NewsoaraBiopharmaCoLtdMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_NewsoaraBiopharmaCoLtdMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Newsoara Biopharma Co., Ltd. [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_NewsoaraBiopharmaCoLtdMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Newsoara Biopharma Co Ltd [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_LicenseAndTechnologyTransferServicesMember" xlink:type="locator" xlink:label="vtvt_LicenseAndTechnologyTransferServicesMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_LicenseAndTechnologyTransferServicesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">License and technology transfer services.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_LicenseAndTechnologyTransferServicesMember" xlink:to="vtvt_LicenseAndTechnologyTransferServicesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_LicenseAndTechnologyTransferServicesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License And Technology Transfer Services [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_LicenseAndTechnologyTransferServicesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">License And Technology Transfer Services [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_AnterisBioIncMember" xlink:type="locator" xlink:label="vtvt_AnterisBioIncMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_AnterisBioIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Anteris Bio, Inc.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_AnterisBioIncMember" xlink:to="vtvt_AnterisBioIncMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_AnterisBioIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Anteris Bio, Inc. [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_AnterisBioIncMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Anteris Bio Inc [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_JDRFInternationalMember" xlink:type="locator" xlink:label="vtvt_JDRFInternationalMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_JDRFInternationalMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">JDRF international.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_JDRFInternationalMember" xlink:to="vtvt_JDRFInternationalMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_JDRFInternationalMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">JDRF [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_JDRFInternationalMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">J D R F International [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems" xlink:type="locator" xlink:label="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems" xlink:to="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_LicenseFeeReceived_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License fee received</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_LicenseFeeReceived_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">License Fee Received</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_PotentialDevelopmentAndRegulatoryMilestonePaymentsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Potential development and regulatory milestone payments</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_PotentialDevelopmentAndRegulatoryMilestonePaymentsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Potential Development And Regulatory Milestone Payments Receivable</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice" xlink:type="locator" xlink:label="us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue recognized from change in estimated transaction prices</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice" xlink:to="us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contract With Customer Liability Cumulative Catch Up Adjustment To Revenue Change In Estimate Of Transaction Price</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized" xlink:type="locator" xlink:label="us-gaap_ContractWithCustomerLiabilityRevenueRecognized" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiabilityRevenueRecognized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collaboration revenue recognized</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractWithCustomerLiabilityRevenueRecognized" xlink:to="us-gaap_ContractWithCustomerLiabilityRevenueRecognized_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiabilityRevenueRecognized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contract With Customer Liability Revenue Recognized</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_PotentialRegulatoryMilestonePaymentsReceivableUponRegulatoryApproval" xlink:type="locator" xlink:label="vtvt_PotentialRegulatoryMilestonePaymentsReceivableUponRegulatoryApproval" />
    <link:label xml:lang="en-US" xlink:label="vtvt_PotentialRegulatoryMilestonePaymentsReceivableUponRegulatoryApproval_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Potential regulatory milestone payments receivable upon regulatory approval.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_PotentialRegulatoryMilestonePaymentsReceivableUponRegulatoryApproval" xlink:to="vtvt_PotentialRegulatoryMilestonePaymentsReceivableUponRegulatoryApproval_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_PotentialSalesMilestonePaymentsReceivable" xlink:type="locator" xlink:label="vtvt_PotentialSalesMilestonePaymentsReceivable" />
    <link:label xml:lang="en-US" xlink:label="vtvt_PotentialSalesMilestonePaymentsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Potential sales milestone payments receivable.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_PotentialSalesMilestonePaymentsReceivable" xlink:to="vtvt_PotentialSalesMilestonePaymentsReceivable_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_PotentialRegulatoryMilestonePaymentsReceivableUponRegulatoryApproval_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Potential regulatory milestone payments based on regulatory approval</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_PotentialRegulatoryMilestonePaymentsReceivableUponRegulatoryApproval_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Potential Regulatory Milestone Payments Receivable Upon Regulatory Approval</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_PotentialSalesMilestonePaymentsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Potential sales-based milestones based on tiered sales of licensed products</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_PotentialSalesMilestonePaymentsReceivable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Potential Sales Milestone Payments Receivable</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_MaximumSponsoringContributionAmount" xlink:type="locator" xlink:label="vtvt_MaximumSponsoringContributionAmount" />
    <link:label xml:lang="en-US" xlink:label="vtvt_MaximumSponsoringContributionAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum sponsoring contribution amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_MaximumSponsoringContributionAmount" xlink:to="vtvt_MaximumSponsoringContributionAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_MaximumSponsoringContributionAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum contribution amount to clinical trial</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_MaximumSponsoringContributionAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Sponsoring Contribution Amount</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligation" xlink:type="locator" xlink:label="us-gaap_RevenueRemainingPerformanceObligation" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenueRemainingPerformanceObligation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized amount of transaction price allocated to performance obligation</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueRemainingPerformanceObligation" xlink:to="us-gaap_RevenueRemainingPerformanceObligation_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RevenueRemainingPerformanceObligation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Revenue Remaining Performance Obligation</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_AdjustmentsToTransactionPriceForPerformanceObligations" xlink:type="locator" xlink:label="vtvt_AdjustmentsToTransactionPriceForPerformanceObligations" />
    <link:label xml:lang="en-US" xlink:label="vtvt_AdjustmentsToTransactionPriceForPerformanceObligations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Adjustments to transaction price for performance obligations.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_AdjustmentsToTransactionPriceForPerformanceObligations" xlink:to="vtvt_AdjustmentsToTransactionPriceForPerformanceObligations_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_AdjustmentsToTransactionPriceForPerformanceObligations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to transaction price for performance obligations</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_AdjustmentsToTransactionPriceForPerformanceObligations_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Adjustments To Transaction Price For Performance Obligations</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromInterestAndDividendsReceived" xlink:type="locator" xlink:label="us-gaap_ProceedsFromInterestAndDividendsReceived" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromInterestAndDividendsReceived_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity interest received</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromInterestAndDividendsReceived" xlink:to="us-gaap_ProceedsFromInterestAndDividendsReceived_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromInterestAndDividendsReceived_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Interest And Dividends Received</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_MaximumResearchFundingReceivableBasedOnAchievementOfResearchAndDevelopmentMilestones" xlink:type="locator" xlink:label="vtvt_MaximumResearchFundingReceivableBasedOnAchievementOfResearchAndDevelopmentMilestones" />
    <link:label xml:lang="en-US" xlink:label="vtvt_MaximumResearchFundingReceivableBasedOnAchievementOfResearchAndDevelopmentMilestones_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum research funding receivable based on achievement of research and development milestones.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_MaximumResearchFundingReceivableBasedOnAchievementOfResearchAndDevelopmentMilestones" xlink:to="vtvt_MaximumResearchFundingReceivableBasedOnAchievementOfResearchAndDevelopmentMilestones_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_MaximumFundingPercentageOfResearchAndDevelopmentMilestones" xlink:type="locator" xlink:label="vtvt_MaximumFundingPercentageOfResearchAndDevelopmentMilestones" />
    <link:label xml:lang="en-US" xlink:label="vtvt_MaximumFundingPercentageOfResearchAndDevelopmentMilestones_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum funding percentage of research and development milestones.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_MaximumFundingPercentageOfResearchAndDevelopmentMilestones" xlink:to="vtvt_MaximumFundingPercentageOfResearchAndDevelopmentMilestones_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_MaximumResearchFundingReceivableBasedOnAchievementOfResearchAndDevelopmentMilestones_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum research funding receivable achievement based on research and development milestones</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_MaximumResearchFundingReceivableBasedOnAchievementOfResearchAndDevelopmentMilestones_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Research Funding Receivable Based On Achievement Of Research And Development Milestones</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_MaximumFundingPercentageOfResearchAndDevelopmentMilestones_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum funding percentage of research and development milestones</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_MaximumFundingPercentageOfResearchAndDevelopmentMilestones_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Funding Percentage Of Research And Development Milestones</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_FundingReceived" xlink:type="locator" xlink:label="vtvt_FundingReceived" />
    <link:label xml:lang="en-US" xlink:label="vtvt_FundingReceived_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Funding received.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_FundingReceived" xlink:to="vtvt_FundingReceived_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_FundingReceived_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Funding received</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_FundingReceived_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Funding Received</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredRevenueDisclosureAbstract" xlink:type="locator" xlink:label="us-gaap_DeferredRevenueDisclosureAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredRevenueDisclosureAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Revenue Disclosure [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredRevenueDisclosureAbstract" xlink:to="us-gaap_DeferredRevenueDisclosureAbstract_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerLiability" xlink:type="locator" xlink:label="us-gaap_ContractWithCustomerLiability" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total contract liabilities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContractWithCustomerLiability" xlink:to="us-gaap_ContractWithCustomerLiability_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ContractWithCustomerLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Contract With Customer Liability</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationAbstract" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationAbstract" xlink:to="us-gaap_ShareBasedCompensationAbstract_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:to="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameAxis" xlink:type="locator" xlink:label="us-gaap_PlanNameAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PlanNameDomain" xlink:type="locator" xlink:label="us-gaap_PlanNameDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameDomain" xlink:to="us-gaap_PlanNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Domain]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_TwoThousandFifteenOmnibusEquityIncentivePlanMember" xlink:type="locator" xlink:label="vtvt_TwoThousandFifteenOmnibusEquityIncentivePlanMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_TwoThousandFifteenOmnibusEquityIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">2015 Omnibus Equity Incentive Plan.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_TwoThousandFifteenOmnibusEquityIncentivePlanMember" xlink:to="vtvt_TwoThousandFifteenOmnibusEquityIncentivePlanMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_TwoThousandFifteenOmnibusEquityIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2015 Omnibus Equity Incentive Plan [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_TwoThousandFifteenOmnibusEquityIncentivePlanMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Fifteen Omnibus Equity Incentive Plan [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis" xlink:type="locator" xlink:label="us-gaap_AwardTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AwardTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Award Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_AwardTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AwardTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Award Type [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Award Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:type="locator" xlink:label="us-gaap_EmployeeStockOptionMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeStockOptionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock Option [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeStockOptionMember" xlink:to="us-gaap_EmployeeStockOptionMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeStockOptionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Employee Stock Option [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_TitleOfIndividualAxis" xlink:type="locator" xlink:label="srt_TitleOfIndividualAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_TitleOfIndividualAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Title of Individual</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_TitleOfIndividualAxis" xlink:to="srt_TitleOfIndividualAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_TitleOfIndividualAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Title Of Individual [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:type="locator" xlink:label="srt_TitleOfIndividualWithRelationshipToEntityDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Title of Individual</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:to="srt_TitleOfIndividualWithRelationshipToEntityDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Title Of Individual With Relationship To Entity [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ChiefExecutiveOfficerMember" xlink:type="locator" xlink:label="srt_ChiefExecutiveOfficerMember" />
    <link:label xml:lang="en-US" xlink:label="srt_ChiefExecutiveOfficerMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Steve Holcombe [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ChiefExecutiveOfficerMember" xlink:to="srt_ChiefExecutiveOfficerMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ChiefExecutiveOfficerMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Chief Executive Officer [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_TypeOneModificationMember" xlink:type="locator" xlink:label="vtvt_TypeOneModificationMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_TypeOneModificationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Type One Modification.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_TypeOneModificationMember" xlink:to="vtvt_TypeOneModificationMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_TypeOneModificationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase Time Period To Exercise Options [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_TypeOneModificationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Type One Modification [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_TypeThreeModificationMember" xlink:type="locator" xlink:label="vtvt_TypeThreeModificationMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_TypeThreeModificationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Type Three Modification.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_TypeThreeModificationMember" xlink:to="vtvt_TypeThreeModificationMember_lbl" />
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    <link:label xml:lang="en-US" xlink:label="vtvt_TypeThreeModificationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Type Three Modification [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based Compensation Arrangement by Share-based Payment Award [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum number of shares to be awarded</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-qualified stock option awards vesting period</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-qualified stock option awards expiration term</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sharebased Compensation Arrangement By Sharebased Payment Award Expiration Period</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:type="locator" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Compensation expense related to share-based awards</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllocatedShareBasedCompensationExpense" xlink:to="us-gaap_AllocatedShareBasedCompensationExpense_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Allocated Share Based Compensation Expense</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense" xlink:type="locator" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax benefit related to stock option awards</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Employee Service Share Based Compensation Tax Benefit From Compensation Expense</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xlink:type="locator" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized compensation cost related to non-vested share-based compensation arrangements</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:type="locator" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average period to recognize unrecognized share-based compensation cost</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average grant date fair value of options granted</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:type="locator" xlink:label="us-gaap_CommonStockSharesIssued" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase of common stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesIssued" xlink:to="us-gaap_CommonStockSharesIssued_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Shares Issued</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelled" xlink:type="locator" xlink:label="vtvt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelled" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelled_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Share Based Compensation Arrangement By Share Based Payment Award Options Cancelled.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelled" xlink:to="vtvt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelled_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_ShareBasedCompensationExpense" xlink:type="locator" xlink:label="vtvt_ShareBasedCompensationExpense" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Share Based Compensation Expense.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_ShareBasedCompensationExpense" xlink:to="vtvt_ShareBasedCompensationExpense_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelled_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock options cancelled</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelled_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Options Cancelled</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share-based compensation expense</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Expense</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedArrangementsToObtainGoodsAndServicesAbstract" xlink:type="locator" xlink:label="us-gaap_ShareBasedArrangementsToObtainGoodsAndServicesAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedArrangementsToObtainGoodsAndServicesAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Arrangements To Obtain Goods And Services [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedArrangementsToObtainGoodsAndServicesAbstract" xlink:to="us-gaap_ShareBasedArrangementsToObtainGoodsAndServicesAbstract_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_ScheduleOfShareBasedCompensationValuationAssumptionsLineItems" xlink:type="locator" xlink:label="vtvt_ScheduleOfShareBasedCompensationValuationAssumptionsLineItems" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ScheduleOfShareBasedCompensationValuationAssumptionsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of share based compensation valuation assumptions.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_ScheduleOfShareBasedCompensationValuationAssumptionsLineItems" xlink:to="vtvt_ScheduleOfShareBasedCompensationValuationAssumptionsLineItems_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_ScheduleOfShareBasedCompensationValuationAssumptionsTable" xlink:type="locator" xlink:label="vtvt_ScheduleOfShareBasedCompensationValuationAssumptionsTable" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ScheduleOfShareBasedCompensationValuationAssumptionsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule Of Share Based Compensation Valuation Assumptions [Table]</link:label>
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    <link:label xml:lang="en-US" xlink:label="vtvt_ScheduleOfShareBasedCompensationValuationAssumptionsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Share Based Compensation Valuation Assumptions [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ScheduleOfShareBasedCompensationValuationAssumptionsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Share Based Compensation Valuation Assumptions [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ScheduleOfShareBasedCompensationValuationAssumptionsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Share Based Compensation Valuation Assumptions [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ScheduleOfShareBasedCompensationValuationAssumptionsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Share Based Compensation Valuation Assumptions [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected volatility</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected life of option, in years</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risk-free interest rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate</link:label>
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total share-based compensation expense</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PrepaidInsurance" xlink:type="locator" xlink:label="us-gaap_PrepaidInsurance" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidInsurance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid insurance</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidInsurance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Insurance</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PrepaidTaxes" xlink:type="locator" xlink:label="us-gaap_PrepaidTaxes" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidTaxes_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid taxes</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidTaxes" xlink:to="us-gaap_PrepaidTaxes_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidTaxes_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Taxes</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredCostsCurrent" xlink:type="locator" xlink:label="us-gaap_DeferredCostsCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredCostsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred financing costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCostsCurrent" xlink:to="us-gaap_DeferredCostsCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredCostsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Costs Current</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherPrepaidExpenseCurrent" xlink:type="locator" xlink:label="us-gaap_OtherPrepaidExpenseCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherPrepaidExpenseCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid - other</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherPrepaidExpenseCurrent" xlink:to="us-gaap_OtherPrepaidExpenseCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherPrepaidExpenseCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Prepaid Expense Current</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:to="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Property Plant And Equipment [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentGross" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total property and equipment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="us-gaap_PropertyPlantAndEquipmentGross_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Property Plant And Equipment Gross</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:type="locator" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: accumulated depreciation and amortization</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:to="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Depreciation Depletion And Amortization Property Plant And Equipment</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Property and equipment, net</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_InvestmentOwnershipPercentage" xlink:type="locator" xlink:label="vtvt_InvestmentOwnershipPercentage" />
    <link:label xml:lang="en-US" xlink:label="vtvt_InvestmentOwnershipPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment ownership percentage.</link:label>
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    <link:label xml:lang="en-US" xlink:label="vtvt_EquitySecuritiesWithReadilyDeterminableFairValueLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity securities with readily determinable fair value line items.</link:label>
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueTable" xlink:type="locator" xlink:label="us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueTable" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input Type</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Axis]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input Type</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MeasurementInputPriceVolatilityMember" xlink:type="locator" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input Price Volatility [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputPriceVolatilityMember" xlink:to="us-gaap_MeasurementInputPriceVolatilityMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Price Volatility [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MeasurementInputRiskFreeInterestRateMember" xlink:type="locator" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input Risk Free Interest Rate [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Risk Free Interest Rate [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_EquitySecuritiesWithReadilyDeterminableFairValueLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Securities With Readily Determinable Fair Value [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_EquitySecuritiesWithReadilyDeterminableFairValueLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Equity Securities With Readily Determinable Fair Value [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_InvestmentOwnershipPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity method investments, ownership percentage</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_InvestmentOwnershipPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Investment Ownership Percentage</link:label>
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    <link:label xml:lang="en-US" xlink:label="vtvt_EquityInvestmentsWithReadilyDeterminableFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity investments with readily determinable fair value.</link:label>
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockMember" xlink:type="locator" xlink:label="us-gaap_PreferredStockMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred Stock [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueLineItems" xlink:type="locator" xlink:label="us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueLineItems" />
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    <link:label xml:lang="en-US" xlink:label="vtvt_EquityInvestmentsWithReadilyDeterminableFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Investments with Readily Determinable Fair Value, Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_EquityInvestmentsWithReadilyDeterminableFairValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Equity Investments With Readily Determinable Fair Value</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount" xlink:type="locator" xlink:label="us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Equity Securities Without Readily Determinable Fair Value Amount</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_LicenseAgreementDate" xlink:type="locator" xlink:label="vtvt_LicenseAgreementDate" />
    <link:label xml:lang="en-US" xlink:label="vtvt_LicenseAgreementDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">License agreement date.</link:label>
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquitySecuritiesFvNiMeasurementInput" xlink:type="locator" xlink:label="us-gaap_EquitySecuritiesFvNiMeasurementInput" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EquitySecuritiesFvNiMeasurementInput_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Expected volatility</link:label>
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    <link:label xml:lang="en-US" xlink:label="vtvt_LicenseAgreementDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Date of agreement</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_LicenseAgreementDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">License Agreement Date</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnrealizedGainLossOnInvestments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrealized Gain (Loss) on Investments</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_AccruedDevelopmentCostsCurrent" xlink:type="locator" xlink:label="vtvt_AccruedDevelopmentCostsCurrent" />
    <link:label xml:lang="en-US" xlink:label="vtvt_AccruedDevelopmentCostsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued development costs current.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_AccruedDevelopmentCostsCurrent" xlink:to="vtvt_AccruedDevelopmentCostsCurrent_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_AccruedCompensationAndRelatedCosts" xlink:type="locator" xlink:label="vtvt_AccruedCompensationAndRelatedCosts" />
    <link:label xml:lang="en-US" xlink:label="vtvt_AccruedCompensationAndRelatedCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued compensation and related costs.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_AccruedCompensationAndRelatedCosts" xlink:to="vtvt_AccruedCompensationAndRelatedCosts_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:type="locator" xlink:label="us-gaap_AccountsPayableCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableCurrent" xlink:to="us-gaap_AccountsPayableCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable Current</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_AccruedDevelopmentCostsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued development costs</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_AccruedDevelopmentCostsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Development Costs Current</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_AccruedCompensationAndRelatedCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued compensation and related costs</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_AccruedCompensationAndRelatedCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Compensation And Related Costs</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:type="locator" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued other</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAccruedLiabilitiesCurrent" xlink:to="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Accrued Liabilities Current</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average incremental borrowing rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:to="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Weighted Average Discount Rate Percent</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remaining operating lease term</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:to="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Weighted Average Remaining Lease Term1</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Liabilities Payments Due [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract" xlink:to="us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2022</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Next Twelve Months</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2023</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Year Two</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Year Three</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2025</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Year Four</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2026</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due Year Five</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Thereafter</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due After Year Five</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total lease payments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lessee Operating Lease Liability Payments Due</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_OperatingLeasesImputedInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: imputed interest</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_OperatingLeasesImputedInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Leases Imputed Interest</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseLiability" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Present value of lease liabilities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLiability" xlink:to="us-gaap_OperatingLeaseLiability_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Liability</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseCost" xlink:type="locator" xlink:label="us-gaap_OperatingLeaseCost" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease cost</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseCost" xlink:to="us-gaap_OperatingLeaseCost_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeaseCost_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Cost</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeasePayments" xlink:type="locator" xlink:label="us-gaap_OperatingLeasePayments" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash paid for operating lease</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasePayments" xlink:to="us-gaap_OperatingLeasePayments_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLeasePayments_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease Payments</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_LeaseExpirationMonthAndYear" xlink:type="locator" xlink:label="vtvt_LeaseExpirationMonthAndYear" />
    <link:label xml:lang="en-US" xlink:label="vtvt_LeaseExpirationMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Lease expiration month and year.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_LeaseExpirationMonthAndYear" xlink:to="vtvt_LeaseExpirationMonthAndYear_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_LeaseExpirationMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease expiration month and year</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_LeaseExpirationMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lease Expiration Month And Year</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessExitCosts1" xlink:type="locator" xlink:label="us-gaap_BusinessExitCosts1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessExitCosts1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease exit costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessExitCosts1" xlink:to="us-gaap_BusinessExitCosts1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_BusinessExitCosts1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Business Exit Costs1</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetRetirementObligation" xlink:type="locator" xlink:label="us-gaap_AssetRetirementObligation" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetRetirementObligation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset retirement obligation</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetRetirementObligation" xlink:to="us-gaap_AssetRetirementObligation_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetRetirementObligation_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Asset Retirement Obligation</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentCarryingAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes payable under the Loan Agreement</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentCarryingAmount" xlink:to="us-gaap_DebtInstrumentCarryingAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Carrying Amount</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:type="locator" xlink:label="us-gaap_ShortTermBorrowings" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermBorrowings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Short-term financing</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermBorrowings" xlink:to="us-gaap_ShortTermBorrowings_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShortTermBorrowings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Short Term Borrowings</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NotesPayable" xlink:type="locator" xlink:label="us-gaap_NotesPayable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NotesPayable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total notes payable</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NotesPayable" xlink:to="us-gaap_NotesPayable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_NotesPayable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_NotesPayableCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: Current portion</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermNotesPayable" xlink:type="locator" xlink:label="us-gaap_LongTermNotesPayable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermNotesPayable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total notes payable, net of current portion</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermNotesPayable" xlink:to="us-gaap_LongTermNotesPayable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongTermNotesPayable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Long Term Notes Payable</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:type="locator" xlink:label="us-gaap_LongtermDebtTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Debt, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongtermDebtTypeAxis" xlink:to="us-gaap_LongtermDebtTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Longterm Debt Type [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:type="locator" xlink:label="us-gaap_LongtermDebtTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Long-term Debt, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongtermDebtTypeDomain" xlink:to="us-gaap_LongtermDebtTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Longterm Debt Type [Domain]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_LoanAndSecurityAgreementMember" xlink:type="locator" xlink:label="vtvt_LoanAndSecurityAgreementMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_LoanAndSecurityAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Loan and security agreement.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_LoanAndSecurityAgreementMember" xlink:to="vtvt_LoanAndSecurityAgreementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_LoanAndSecurityAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loan and Security Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_LoanAndSecurityAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loan And Security Agreement [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lender Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityAxis" xlink:to="us-gaap_LineOfCreditFacilityAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityLenderDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityLenderDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of Credit Facility, Lender</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityLenderDomain" xlink:to="us-gaap_LineOfCreditFacilityLenderDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityLenderDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Lender [Domain]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_HorizonTechnologyFinanceCorporationAndSiliconValleyBankMember" xlink:type="locator" xlink:label="vtvt_HorizonTechnologyFinanceCorporationAndSiliconValleyBankMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_HorizonTechnologyFinanceCorporationAndSiliconValleyBankMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Horizon Technology Finance Corporation and Silicon Valley Bank.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_HorizonTechnologyFinanceCorporationAndSiliconValleyBankMember" xlink:to="vtvt_HorizonTechnologyFinanceCorporationAndSiliconValleyBankMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_HorizonTechnologyFinanceCorporationAndSiliconValleyBankMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Horizon Technology Finance Corporation and Silicon Valley Bank [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_HorizonTechnologyFinanceCorporationAndSiliconValleyBankMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Horizon Technology Finance Corporation And Silicon Valley Bank [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateAxis" xlink:type="locator" xlink:label="us-gaap_VariableRateAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VariableRateAxis" xlink:to="us-gaap_VariableRateAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateDomain" xlink:type="locator" xlink:label="us-gaap_VariableRateDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VariableRateDomain" xlink:to="us-gaap_VariableRateDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:type="locator" xlink:label="us-gaap_LondonInterbankOfferedRateLIBORMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">LIBOR [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:to="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LondonInterbankOfferedRateLIBORMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">London Interbank Offered Rate L I B O R [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentNameDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument, Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="us-gaap_DebtInstrumentNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Name [Domain]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_DebtInstrumentTrancheOneMember" xlink:type="locator" xlink:label="vtvt_DebtInstrumentTrancheOneMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_DebtInstrumentTrancheOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument tranche one.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_DebtInstrumentTrancheOneMember" xlink:to="vtvt_DebtInstrumentTrancheOneMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_DebtInstrumentTrancheOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tranche One [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_DebtInstrumentTrancheOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Tranche One [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_DebtInstrumentTrancheTwoMember" xlink:type="locator" xlink:label="vtvt_DebtInstrumentTrancheTwoMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_DebtInstrumentTrancheTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument tranche two.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_DebtInstrumentTrancheTwoMember" xlink:to="vtvt_DebtInstrumentTrancheTwoMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_DebtInstrumentTrancheTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tranche Two [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_DebtInstrumentTrancheTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Tranche Two [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_DebtInstrumentTrancheOneAndTwoMember" xlink:type="locator" xlink:label="vtvt_DebtInstrumentTrancheOneAndTwoMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_DebtInstrumentTrancheOneAndTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument tranche One and two.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_DebtInstrumentTrancheOneAndTwoMember" xlink:to="vtvt_DebtInstrumentTrancheOneAndTwoMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_DebtInstrumentTrancheOneAndTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tranche One And Two [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_DebtInstrumentTrancheOneAndTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Tranche One And Two [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_DebtInstrumentTrancheThreeMember" xlink:type="locator" xlink:label="vtvt_DebtInstrumentTrancheThreeMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_DebtInstrumentTrancheThreeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument tranche three.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_DebtInstrumentTrancheThreeMember" xlink:to="vtvt_DebtInstrumentTrancheThreeMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_DebtInstrumentTrancheThreeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tranche Three [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_DebtInstrumentTrancheThreeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Tranche Three [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromNotesPayable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Loan borrowed amount</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_InterestRateFloor" xlink:type="locator" xlink:label="vtvt_InterestRateFloor" />
    <link:label xml:lang="en-US" xlink:label="vtvt_InterestRateFloor_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest rate floor.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_InterestRateFloor" xlink:to="vtvt_InterestRateFloor_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_InterestRateFloor_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, interest rate floor</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_InterestRateFloor_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Rate Floor</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable rate basis</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:to="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Description Of Variable Rate Basis</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityInterestRateDescription" xlink:type="locator" xlink:label="us-gaap_LineOfCreditFacilityInterestRateDescription" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityInterestRateDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest rate description</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityInterestRateDescription" xlink:to="us-gaap_LineOfCreditFacilityInterestRateDescription_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LineOfCreditFacilityInterestRateDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Line Of Credit Facility Interest Rate Description</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentPaymentTerms" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentPaymentTerms" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentPaymentTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, payment terms</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentPaymentTerms" xlink:to="us-gaap_DebtInstrumentPaymentTerms_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentPaymentTerms_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Payment Terms</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentPeriodicPaymentTermsBalloonPaymentToBePaid" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentTermsBalloonPaymentToBePaid" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentTermsBalloonPaymentToBePaid_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, final payment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentPeriodicPaymentTermsBalloonPaymentToBePaid" xlink:to="us-gaap_DebtInstrumentPeriodicPaymentTermsBalloonPaymentToBePaid_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentPeriodicPaymentTermsBalloonPaymentToBePaid_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Periodic Payment Terms Balloon Payment To Be Paid</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentMaturityDate" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, maturity date</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentMaturityDate" xlink:to="us-gaap_DebtInstrumentMaturityDate_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Maturity Date</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentFrequencyOfPeriodicPayment" xlink:type="locator" xlink:label="us-gaap_DebtInstrumentFrequencyOfPeriodicPayment" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentFrequencyOfPeriodicPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, frequency of periodic Payment</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFrequencyOfPeriodicPayment" xlink:to="us-gaap_DebtInstrumentFrequencyOfPeriodicPayment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DebtInstrumentFrequencyOfPeriodicPayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Frequency Of Periodic Payment</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_WarrantsSharesIssuedPercentageOfLoanAmount" xlink:type="locator" xlink:label="vtvt_WarrantsSharesIssuedPercentageOfLoanAmount" />
    <link:label xml:lang="en-US" xlink:label="vtvt_WarrantsSharesIssuedPercentageOfLoanAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrants shares issued percentage of loan amount.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_WarrantsSharesIssuedPercentageOfLoanAmount" xlink:to="vtvt_WarrantsSharesIssuedPercentageOfLoanAmount_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_WarrantExercisePriceDescription" xlink:type="locator" xlink:label="vtvt_WarrantExercisePriceDescription" />
    <link:label xml:lang="en-US" xlink:label="vtvt_WarrantExercisePriceDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrant exercise price description.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_WarrantExercisePriceDescription" xlink:to="vtvt_WarrantExercisePriceDescription_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_WarrantsExpirationPeriod" xlink:type="locator" xlink:label="vtvt_WarrantsExpirationPeriod" />
    <link:label xml:lang="en-US" xlink:label="vtvt_WarrantsExpirationPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrants expiration period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_WarrantsExpirationPeriod" xlink:to="vtvt_WarrantsExpirationPeriod_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:type="locator" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants to purchase shares of common stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights" xlink:to="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right Number Of Securities Called By Warrants Or Rights</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:type="locator" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise price of warrants</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:to="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_WarrantsSharesIssuedPercentageOfLoanAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant shares percentage issued of loan amount</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_WarrantsSharesIssuedPercentageOfLoanAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Shares Issued Percentage Of Loan Amount</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_WarrantExercisePriceDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant exercise price condition</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_WarrantExercisePriceDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Warrant Exercise Price Description</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_WarrantsExpirationPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants expiration period</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_WarrantsExpirationPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Expiration Period</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_LoanAgreementTerminationPeriod" xlink:type="locator" xlink:label="vtvt_LoanAgreementTerminationPeriod" />
    <link:label xml:lang="en-US" xlink:label="vtvt_LoanAgreementTerminationPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Loan agreement termination period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_LoanAgreementTerminationPeriod" xlink:to="vtvt_LoanAgreementTerminationPeriod_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestExpenseDebt" xlink:type="locator" xlink:label="us-gaap_InterestExpenseDebt" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpenseDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest expense related to loan agreement</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpenseDebt" xlink:to="us-gaap_InterestExpenseDebt_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InterestExpenseDebt_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense Debt</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_LoanAgreementTerminationPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loan agreement termination period</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_LoanAgreementTerminationPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Loan Agreement Termination Period</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_PotentialMilestonePayment" xlink:type="locator" xlink:label="vtvt_PotentialMilestonePayment" />
    <link:label xml:lang="en-US" xlink:label="vtvt_PotentialMilestonePayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Potential milestone payment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_PotentialMilestonePayment" xlink:to="vtvt_PotentialMilestonePayment_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commitments And Contingencies Disclosure [Abstract]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_CommitmentsAndContingenciesLineItems" xlink:type="locator" xlink:label="vtvt_CommitmentsAndContingenciesLineItems" />
    <link:label xml:lang="en-US" xlink:label="vtvt_CommitmentsAndContingenciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commitments and Contingencies.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_CommitmentsAndContingenciesLineItems" xlink:to="vtvt_CommitmentsAndContingenciesLineItems_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_CommitmentsAndContingenciesTable" xlink:type="locator" xlink:label="vtvt_CommitmentsAndContingenciesTable" />
    <link:label xml:lang="en-US" xlink:label="vtvt_CommitmentsAndContingenciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commitments And Contingencies [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_CommitmentsAndContingenciesTable" xlink:to="vtvt_CommitmentsAndContingenciesTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_CommitmentsAndContingenciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments And Contingencies [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_CommitmentsAndContingenciesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commitments And Contingencies [Table]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_DevelopmentalAndRegulatoryMilestonePaymentMember" xlink:type="locator" xlink:label="vtvt_DevelopmentalAndRegulatoryMilestonePaymentMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_DevelopmentalAndRegulatoryMilestonePaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Developmental and regulatory milestone payment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_DevelopmentalAndRegulatoryMilestonePaymentMember" xlink:to="vtvt_DevelopmentalAndRegulatoryMilestonePaymentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_DevelopmentalAndRegulatoryMilestonePaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Developmental And Regulatory Milestone Payment</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_DevelopmentalAndRegulatoryMilestonePaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Developmental And Regulatory Milestone Payment [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_SalesBasedMilestonesPaymentMember" xlink:type="locator" xlink:label="vtvt_SalesBasedMilestonesPaymentMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_SalesBasedMilestonesPaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Sales-based milestones payment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_SalesBasedMilestonesPaymentMember" xlink:to="vtvt_SalesBasedMilestonesPaymentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_SalesBasedMilestonesPaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales-based Milestones Payment [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_SalesBasedMilestonesPaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sales Based Milestones Payment [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_SatisfactionOfMilestonePaymentMember" xlink:type="locator" xlink:label="vtvt_SatisfactionOfMilestonePaymentMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_SatisfactionOfMilestonePaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Satisfaction of milestone payment.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_SatisfactionOfMilestonePaymentMember" xlink:to="vtvt_SatisfactionOfMilestonePaymentMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_SatisfactionOfMilestonePaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Satisfaction of Milestone Payment [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_SatisfactionOfMilestonePaymentMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Satisfaction Of Milestone Payment [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_NovoLicenseAgreementMember" xlink:type="locator" xlink:label="vtvt_NovoLicenseAgreementMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_NovoLicenseAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Novo license agreement.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_NovoLicenseAgreementMember" xlink:to="vtvt_NovoLicenseAgreementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_NovoLicenseAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Novo License Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_NovoLicenseAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Novo License Agreement [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis" xlink:type="locator" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and Development Arrangement, Contract to Perform for Others, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis" xlink:to="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Research And Development Arrangement Contract To Perform For Others By Type [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain" xlink:type="locator" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and Development Arrangement, Contract to Perform for Others, Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain" xlink:to="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Research And Development Arrangement Contract To Perform For Others Type [Domain]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_OtherIndicationMember" xlink:type="locator" xlink:label="vtvt_OtherIndicationMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_OtherIndicationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Other indication.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_OtherIndicationMember" xlink:to="vtvt_OtherIndicationMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_OtherIndicationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Indication [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_OtherIndicationMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Other Indication [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_TypeOneDiabetesMember" xlink:type="locator" xlink:label="vtvt_TypeOneDiabetesMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_TypeOneDiabetesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Type 1 diabetes.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_TypeOneDiabetesMember" xlink:to="vtvt_TypeOneDiabetesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_TypeOneDiabetesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Type 1 Diabetes [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_TypeOneDiabetesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Type One Diabetes [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_TypeTwoDiabetesMember" xlink:type="locator" xlink:label="vtvt_TypeTwoDiabetesMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_TypeTwoDiabetesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Type 2 diabetes.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_TypeTwoDiabetesMember" xlink:to="vtvt_TypeTwoDiabetesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_TypeTwoDiabetesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Type 2 Diabetes [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_TypeTwoDiabetesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Type Two Diabetes [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_CommitmentsAndContingenciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments And Contingencies [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_CommitmentsAndContingenciesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commitments And Contingencies [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_PotentialMilestonePayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Potential milestone payment</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_PotentialMilestonePayment_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Potential Milestone Payment</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfStockByClassTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfStockByClassTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Stock By Class [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="us-gaap_ScheduleOfStockByClassTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfStockByClassTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Stock By Class [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransactionTypeAxis" xlink:type="locator" xlink:label="us-gaap_TransactionTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TransactionTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transaction Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TransactionTypeAxis" xlink:to="us-gaap_TransactionTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TransactionTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Transaction Type [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransactionDomain" xlink:type="locator" xlink:label="us-gaap_TransactionDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TransactionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transaction</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TransactionDomain" xlink:to="us-gaap_TransactionDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TransactionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Transaction [Domain]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_AtTheMarketOfferingMember" xlink:type="locator" xlink:label="vtvt_AtTheMarketOfferingMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_AtTheMarketOfferingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">At the market offering.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_AtTheMarketOfferingMember" xlink:to="vtvt_AtTheMarketOfferingMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_AtTheMarketOfferingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ATM Offering [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_AtTheMarketOfferingMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">At The Market Offering [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_RegularPurchaseShareLimitOneMember" xlink:type="locator" xlink:label="vtvt_RegularPurchaseShareLimitOneMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_RegularPurchaseShareLimitOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Regular purchase share limit one member.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_RegularPurchaseShareLimitOneMember" xlink:to="vtvt_RegularPurchaseShareLimitOneMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_RegularPurchaseShareLimitOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Regular Purchase Share Limit [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_RegularPurchaseShareLimitOneMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Regular Purchase Share Limit One [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_RegularPurchaseShareLimitTwoMember" xlink:type="locator" xlink:label="vtvt_RegularPurchaseShareLimitTwoMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_RegularPurchaseShareLimitTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Regular purchase share limit two member.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_RegularPurchaseShareLimitTwoMember" xlink:to="vtvt_RegularPurchaseShareLimitTwoMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_RegularPurchaseShareLimitTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Regular Purchase Share Limit Two [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_RegularPurchaseShareLimitTwoMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Regular Purchase Share Limit Two [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_RegularPurchaseShareLimitThreeMember" xlink:type="locator" xlink:label="vtvt_RegularPurchaseShareLimitThreeMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_RegularPurchaseShareLimitThreeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Regular purchase share limit three member.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_RegularPurchaseShareLimitThreeMember" xlink:to="vtvt_RegularPurchaseShareLimitThreeMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_RegularPurchaseShareLimitThreeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Regular Purchase Share Limit Three [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_RegularPurchaseShareLimitThreeMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Regular Purchase Share Limit Three [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_AdditionalAcceleratedMember" xlink:type="locator" xlink:label="vtvt_AdditionalAcceleratedMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_AdditionalAcceleratedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Additional accelerated member.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_AdditionalAcceleratedMember" xlink:to="vtvt_AdditionalAcceleratedMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_AdditionalAcceleratedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional Accelerated [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_AdditionalAcceleratedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Additional Accelerated [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_LincolnParkCapitalFundLLCAndAffiliatesMember" xlink:type="locator" xlink:label="vtvt_LincolnParkCapitalFundLLCAndAffiliatesMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_LincolnParkCapitalFundLLCAndAffiliatesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Lincoln Park Capital Fund LLC and Affiliates member.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_LincolnParkCapitalFundLLCAndAffiliatesMember" xlink:to="vtvt_LincolnParkCapitalFundLLCAndAffiliatesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_LincolnParkCapitalFundLLCAndAffiliatesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lincoln Park Capital Fund, LLC and Affiliates [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_LincolnParkCapitalFundLLCAndAffiliatesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Lincoln Park Capital Fund L L C And Affiliates [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_ExchangeCapMember" xlink:type="locator" xlink:label="vtvt_ExchangeCapMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ExchangeCapMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Transaction that take place immediately prior to the execution of the agreement.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_ExchangeCapMember" xlink:to="vtvt_ExchangeCapMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ExchangeCapMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exchange Cap [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ExchangeCapMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Exchange Cap [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockLineItems" xlink:type="locator" xlink:label="us-gaap_ClassOfStockLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfStockLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class Of Stock [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_ClassOfStockLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfStockLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Stock [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:type="locator" xlink:label="us-gaap_PreferredStockSharesAuthorized" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares authorized</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesAuthorized" xlink:to="us-gaap_PreferredStockSharesAuthorized_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Shares Authorized</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:type="locator" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock par value</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockParOrStatedValuePerShare" xlink:to="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock Par Or Stated Value Per Share</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_IncreaseInCommonStockSharesAuthorized" xlink:type="locator" xlink:label="vtvt_IncreaseInCommonStockSharesAuthorized" />
    <link:label xml:lang="en-US" xlink:label="vtvt_IncreaseInCommonStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Increase in common stock shares authorized.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_IncreaseInCommonStockSharesAuthorized" xlink:to="vtvt_IncreaseInCommonStockSharesAuthorized_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_CommonStockAndPreferredStockSharesAuthorized" xlink:type="locator" xlink:label="vtvt_CommonStockAndPreferredStockSharesAuthorized" />
    <link:label xml:lang="en-US" xlink:label="vtvt_CommonStockAndPreferredStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Common stock and preferred stock shares authorized.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_CommonStockAndPreferredStockSharesAuthorized" xlink:to="vtvt_CommonStockAndPreferredStockSharesAuthorized_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_IncreaseInCommonStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase in shares authorized</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_IncreaseInCommonStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Increase In Common Stock Shares Authorized</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_CommonStockAndPreferredStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital stock, shares authorized</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_CommonStockAndPreferredStockSharesAuthorized_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock And Preferred Stock Shares Authorized</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_CommonStockNumberOfVotesPerShare" xlink:type="locator" xlink:label="vtvt_CommonStockNumberOfVotesPerShare" />
    <link:label xml:lang="en-US" xlink:label="vtvt_CommonStockNumberOfVotesPerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Common stock number of votes per share.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_CommonStockNumberOfVotesPerShare" xlink:to="vtvt_CommonStockNumberOfVotesPerShare_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockVotingRights" xlink:type="locator" xlink:label="us-gaap_CommonStockVotingRights" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockVotingRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, voting rights</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockVotingRights" xlink:to="us-gaap_CommonStockVotingRights_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_CommonStockVotingRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Voting Rights</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_CommonStockNumberOfVotesPerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, vote per share</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_CommonStockNumberOfVotesPerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Number Of Votes Per Share</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate offering price</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period Value New Issues</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_AggregateOfferingPrice" xlink:type="locator" xlink:label="vtvt_AggregateOfferingPrice" />
    <link:label xml:lang="en-US" xlink:label="vtvt_AggregateOfferingPrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Aggregate offering price.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_AggregateOfferingPrice" xlink:to="vtvt_AggregateOfferingPrice_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_AggregateOfferingPrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate offering price</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_AggregateOfferingPrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Aggregate Offering Price</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_ProceedsFromIssuanceOfCommonStockGross" xlink:type="locator" xlink:label="vtvt_ProceedsFromIssuanceOfCommonStockGross" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ProceedsFromIssuanceOfCommonStockGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Total gross proceeds from issuance of common stock</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_ProceedsFromIssuanceOfCommonStockGross" xlink:to="vtvt_ProceedsFromIssuanceOfCommonStockGross_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:type="locator" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares sold</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:to="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Number Of Shares Issued In Transaction</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ProceedsFromIssuanceOfCommonStockGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross proceeds from issuance of common stock</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ProceedsFromIssuanceOfCommonStockGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Issuance Of Common Stock Gross</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net proceeds from issuance of common stock</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_SharesRegisteredUnderTheLPCAgreement" xlink:type="locator" xlink:label="vtvt_SharesRegisteredUnderTheLPCAgreement" />
    <link:label xml:lang="en-US" xlink:label="vtvt_SharesRegisteredUnderTheLPCAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Shares registered under the LPC agreement.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_SharesRegisteredUnderTheLPCAgreement" xlink:to="vtvt_SharesRegisteredUnderTheLPCAgreement_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_SharesRegisteredUnderTheLPCAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares registered under the LPC agreement</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_SharesRegisteredUnderTheLPCAgreement_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Shares Registered Under The L P C Agreement</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_PercentageOfAggregateOfferingPrice" xlink:type="locator" xlink:label="vtvt_PercentageOfAggregateOfferingPrice" />
    <link:label xml:lang="en-US" xlink:label="vtvt_PercentageOfAggregateOfferingPrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of aggregate offering price.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_PercentageOfAggregateOfferingPrice" xlink:to="vtvt_PercentageOfAggregateOfferingPrice_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_PercentageOfAggregateOfferingPrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of aggregate offering price</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_PercentageOfAggregateOfferingPrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Aggregate Offering Price</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleOfStockPricePerShare" xlink:type="locator" xlink:label="us-gaap_SaleOfStockPricePerShare" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockPricePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share price</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockPricePerShare" xlink:to="us-gaap_SaleOfStockPricePerShare_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockPricePerShare_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Price Per Share</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleOfStockConsiderationReceivedOnTransaction" xlink:type="locator" xlink:label="us-gaap_SaleOfStockConsiderationReceivedOnTransaction" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockConsiderationReceivedOnTransaction_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate gross purchase price</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockConsiderationReceivedOnTransaction" xlink:to="us-gaap_SaleOfStockConsiderationReceivedOnTransaction_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SaleOfStockConsiderationReceivedOnTransaction_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Consideration Received On Transaction</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_SaleOfStockNumberOfSharesIssuedInTransactionPerDay" xlink:type="locator" xlink:label="vtvt_SaleOfStockNumberOfSharesIssuedInTransactionPerDay" />
    <link:label xml:lang="en-US" xlink:label="vtvt_SaleOfStockNumberOfSharesIssuedInTransactionPerDay_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale of stock, number of shares issued in transaction per day.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_SaleOfStockNumberOfSharesIssuedInTransactionPerDay" xlink:to="vtvt_SaleOfStockNumberOfSharesIssuedInTransactionPerDay_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_SaleOfStockIncreaseDecreaseInNumberOfSharesIssuedInTransactionPerDay" xlink:type="locator" xlink:label="vtvt_SaleOfStockIncreaseDecreaseInNumberOfSharesIssuedInTransactionPerDay" />
    <link:label xml:lang="en-US" xlink:label="vtvt_SaleOfStockIncreaseDecreaseInNumberOfSharesIssuedInTransactionPerDay_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale of stock, increase (decrease) in number of shares issued in transaction per day.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_SaleOfStockIncreaseDecreaseInNumberOfSharesIssuedInTransactionPerDay" xlink:to="vtvt_SaleOfStockIncreaseDecreaseInNumberOfSharesIssuedInTransactionPerDay_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_SaleOfStockMaximumNumberOfSharesIssuedInTransactionPerDay" xlink:type="locator" xlink:label="vtvt_SaleOfStockMaximumNumberOfSharesIssuedInTransactionPerDay" />
    <link:label xml:lang="en-US" xlink:label="vtvt_SaleOfStockMaximumNumberOfSharesIssuedInTransactionPerDay_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale of stock, maximum number of shares issued in transaction per day.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_SaleOfStockMaximumNumberOfSharesIssuedInTransactionPerDay" xlink:to="vtvt_SaleOfStockMaximumNumberOfSharesIssuedInTransactionPerDay_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_AgreementTerm" xlink:type="locator" xlink:label="vtvt_AgreementTerm" />
    <link:label xml:lang="en-US" xlink:label="vtvt_AgreementTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Agreement term.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_AgreementTerm" xlink:to="vtvt_AgreementTerm_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_PurchasePriceDescription" xlink:type="locator" xlink:label="vtvt_PurchasePriceDescription" />
    <link:label xml:lang="en-US" xlink:label="vtvt_PurchasePriceDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Description of the purchase price for shares.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_PurchasePriceDescription" xlink:to="vtvt_PurchasePriceDescription_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_AgreementTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Agreement term</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_AgreementTerm_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Agreement Term</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_SaleOfStockNumberOfSharesIssuedInTransactionPerDay_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of shares issued per day</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_SaleOfStockNumberOfSharesIssuedInTransactionPerDay_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Number Of Shares Issued In Transaction Per Day</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_SaleOfStockIncreaseDecreaseInNumberOfSharesIssuedInTransactionPerDay_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase in number of shares issued per day</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_SaleOfStockIncreaseDecreaseInNumberOfSharesIssuedInTransactionPerDay_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Increase Decrease In Number Of Shares Issued In Transaction Per Day</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_SaleOfStockMaximumNumberOfSharesIssuedInTransactionPerDay_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum obligation for number of shares issued per day</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_SaleOfStockMaximumNumberOfSharesIssuedInTransactionPerDay_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Maximum Number Of Shares Issued In Transaction Per Day</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_PurchasePriceDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase price for shares</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_PurchasePriceDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Purchase Price Description</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_SaleOfStockPercentageOfNumberOfSharesIssuedDuringPeriodInTransaction" xlink:type="locator" xlink:label="vtvt_SaleOfStockPercentageOfNumberOfSharesIssuedDuringPeriodInTransaction" />
    <link:label xml:lang="en-US" xlink:label="vtvt_SaleOfStockPercentageOfNumberOfSharesIssuedDuringPeriodInTransaction_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale of stock, percentage of total number of shares issued in transaction during a period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_SaleOfStockPercentageOfNumberOfSharesIssuedDuringPeriodInTransaction" xlink:to="vtvt_SaleOfStockPercentageOfNumberOfSharesIssuedDuringPeriodInTransaction_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_CommonStockTradedDuringPeriodSharesPercentage" xlink:type="locator" xlink:label="vtvt_CommonStockTradedDuringPeriodSharesPercentage" />
    <link:label xml:lang="en-US" xlink:label="vtvt_CommonStockTradedDuringPeriodSharesPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of number of common stock shares traded during period.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_CommonStockTradedDuringPeriodSharesPercentage" xlink:to="vtvt_CommonStockTradedDuringPeriodSharesPercentage_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_SaleOfStockPricePerSharePercentageOfVolumeWeightedAveragePrice" xlink:type="locator" xlink:label="vtvt_SaleOfStockPricePerSharePercentageOfVolumeWeightedAveragePrice" />
    <link:label xml:lang="en-US" xlink:label="vtvt_SaleOfStockPricePerSharePercentageOfVolumeWeightedAveragePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Sale of stock, price per share, percentage of the volume weighted average price.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_SaleOfStockPricePerSharePercentageOfVolumeWeightedAveragePrice" xlink:to="vtvt_SaleOfStockPricePerSharePercentageOfVolumeWeightedAveragePrice_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_SaleOfStockPercentageOfNumberOfSharesIssuedDuringPeriodInTransaction_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of number of shares issued during period</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_SaleOfStockPercentageOfNumberOfSharesIssuedDuringPeriodInTransaction_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Percentage Of Number Of Shares Issued During Period In Transaction</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_CommonStockTradedDuringPeriodSharesPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of number of common stock shares traded during period</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_CommonStockTradedDuringPeriodSharesPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Traded During Period Shares Percentage</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_SaleOfStockPricePerSharePercentageOfVolumeWeightedAveragePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share price as a percentage of the volume weighted average price</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_SaleOfStockPricePerSharePercentageOfVolumeWeightedAveragePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Sale Of Stock Price Per Share Percentage Of Volume Weighted Average Price</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_OwnershipPercentageByNonControllingOwners" xlink:type="locator" xlink:label="vtvt_OwnershipPercentageByNonControllingOwners" />
    <link:label xml:lang="en-US" xlink:label="vtvt_OwnershipPercentageByNonControllingOwners_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Ownership percentage by non-controlling owners.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_OwnershipPercentageByNonControllingOwners" xlink:to="vtvt_OwnershipPercentageByNonControllingOwners_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_OwnershipPercentageByNonControllingOwners_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ownership percentage by noncontrolling owners</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_OwnershipPercentageByNonControllingOwners_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Ownership Percentage By Non Controlling Owners</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_MaximumNumberOfSharesToBeIssuedAsPercentageOfOutstanding" xlink:type="locator" xlink:label="vtvt_MaximumNumberOfSharesToBeIssuedAsPercentageOfOutstanding" />
    <link:label xml:lang="en-US" xlink:label="vtvt_MaximumNumberOfSharesToBeIssuedAsPercentageOfOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum Number of shares to be issued as percentage of outstanding.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_MaximumNumberOfSharesToBeIssuedAsPercentageOfOutstanding" xlink:to="vtvt_MaximumNumberOfSharesToBeIssuedAsPercentageOfOutstanding_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_MaximumNumberOfSharesToBeIssued" xlink:type="locator" xlink:label="vtvt_MaximumNumberOfSharesToBeIssued" />
    <link:label xml:lang="en-US" xlink:label="vtvt_MaximumNumberOfSharesToBeIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum number of shares to be issued.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_MaximumNumberOfSharesToBeIssued" xlink:to="vtvt_MaximumNumberOfSharesToBeIssued_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_MaximumNumberOfSharesToBeIssuedAsPercentageOfOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum number of shares to be issued as percentage of outstanding</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_MaximumNumberOfSharesToBeIssuedAsPercentageOfOutstanding_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Number Of Shares To Be Issued As Percentage Of Outstanding</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_MaximumNumberOfSharesToBeIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum number of shares to be issued</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_MaximumNumberOfSharesToBeIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Number Of Shares To Be Issued</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAdjustmentOfWarrants" xlink:type="locator" xlink:label="us-gaap_FairValueAdjustmentOfWarrants" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value of consideration warrants expense</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAdjustmentOfWarrants" xlink:to="us-gaap_FairValueAdjustmentOfWarrants_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Adjustment Of Warrants</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Table]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_LetterAgreementWarrantsMember" xlink:type="locator" xlink:label="vtvt_LetterAgreementWarrantsMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_LetterAgreementWarrantsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Letter agreement warrants.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_LetterAgreementWarrantsMember" xlink:to="vtvt_LetterAgreementWarrantsMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_LetterAgreementWarrantsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Letter Agreement Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_LetterAgreementWarrantsMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Letter Agreement Warrants [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Expected Volatility [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MeasurementInputExpectedTermMember" xlink:type="locator" xlink:label="us-gaap_MeasurementInputExpectedTermMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputExpectedTermMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected Life of Option, in Years [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputExpectedTermMember" xlink:to="us-gaap_MeasurementInputExpectedTermMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputExpectedTermMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Expected Term [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Risk-Free Interest Rate [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MeasurementInputExpectedDividendRateMember" xlink:type="locator" xlink:label="us-gaap_MeasurementInputExpectedDividendRateMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputExpectedDividendRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected Dividend Yield [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputExpectedDividendRateMember" xlink:to="us-gaap_MeasurementInputExpectedDividendRateMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MeasurementInputExpectedDividendRateMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Expected Dividend Rate [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:type="locator" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WarrantsAndRightsOutstandingMeasurementInput" xlink:type="locator" xlink:label="us-gaap_WarrantsAndRightsOutstandingMeasurementInput" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_WarrantsAndRightsOutstandingMeasurementInput_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Measurement input</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantsAndRightsOutstandingMeasurementInput" xlink:to="us-gaap_WarrantsAndRightsOutstandingMeasurementInput_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_WarrantsAndRightsOutstandingMeasurementInput_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Warrants And Rights Outstanding Measurement Input</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_PeriodUsedToDetermineExchangeValueBasedOnWeightedAveragePriceOfClassCommonStock" xlink:type="locator" xlink:label="vtvt_PeriodUsedToDetermineExchangeValueBasedOnWeightedAveragePriceOfClassCommonStock" />
    <link:label xml:lang="en-US" xlink:label="vtvt_PeriodUsedToDetermineExchangeValueBasedOnWeightedAveragePriceOfClassCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Period used to determine exchange value based on weighted average price of Class A common stock.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_PeriodUsedToDetermineExchangeValueBasedOnWeightedAveragePriceOfClassCommonStock" xlink:to="vtvt_PeriodUsedToDetermineExchangeValueBasedOnWeightedAveragePriceOfClassCommonStock_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_RedeemableNonControllingInterestExchangeAgreementStockConversionRatio" xlink:type="locator" xlink:label="vtvt_RedeemableNonControllingInterestExchangeAgreementStockConversionRatio" />
    <link:label xml:lang="en-US" xlink:label="vtvt_RedeemableNonControllingInterestExchangeAgreementStockConversionRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Redeemable non controlling interest exchange agreement stock conversion ratio.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_RedeemableNonControllingInterestExchangeAgreementStockConversionRatio" xlink:to="vtvt_RedeemableNonControllingInterestExchangeAgreementStockConversionRatio_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MinorityInterestTable" xlink:type="locator" xlink:label="us-gaap_MinorityInterestTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MinorityInterestTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minority Interest [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinorityInterestTable" xlink:to="us-gaap_MinorityInterestTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MinorityInterestTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minority Interest [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConversionOfStockByUniqueDescriptionAxis" xlink:type="locator" xlink:label="us-gaap_ConversionOfStockByUniqueDescriptionAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConversionOfStockByUniqueDescriptionAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock Conversion Description</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConversionOfStockByUniqueDescriptionAxis" xlink:to="us-gaap_ConversionOfStockByUniqueDescriptionAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConversionOfStockByUniqueDescriptionAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Conversion Of Stock By Unique Description [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConversionOfStockNameDomain" xlink:type="locator" xlink:label="us-gaap_ConversionOfStockNameDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConversionOfStockNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Conversion of Stock, Name</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConversionOfStockNameDomain" xlink:to="us-gaap_ConversionOfStockNameDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConversionOfStockNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Conversion Of Stock Name [Domain]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_ExchangeOfRedeemableNonControllingInterestToClassACommonStockMember" xlink:type="locator" xlink:label="vtvt_ExchangeOfRedeemableNonControllingInterestToClassACommonStockMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ExchangeOfRedeemableNonControllingInterestToClassACommonStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Exchange of redeemable non controlling interest to class A common stock.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_ExchangeOfRedeemableNonControllingInterestToClassACommonStockMember" xlink:to="vtvt_ExchangeOfRedeemableNonControllingInterestToClassACommonStockMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ExchangeOfRedeemableNonControllingInterestToClassACommonStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exchange of Redeemable Non controlling Interest To Class A Common Stock [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ExchangeOfRedeemableNonControllingInterestToClassACommonStockMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Exchange Of Redeemable Non Controlling Interest To Class A Common Stock [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MinorityInterestLineItems" xlink:type="locator" xlink:label="us-gaap_MinorityInterestLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MinorityInterestLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Noncontrolling Interest [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinorityInterestLineItems" xlink:to="us-gaap_MinorityInterestLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_MinorityInterestLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Minority Interest [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_PercentageOfNonVotingEconomicInterest_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Noncontrolling interest ownership percentage</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_PeriodUsedToDetermineExchangeValueBasedOnWeightedAveragePriceOfClassCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of days used to determine exchange value based on weighted average price of Class A common stock</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_PeriodUsedToDetermineExchangeValueBasedOnWeightedAveragePriceOfClassCommonStock_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Period Used To Determine Exchange Value Based On Weighted Average Price Of Class Common Stock</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_RedeemableNonControllingInterestExchangeAgreementStockConversionRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock conversion ratio</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_RedeemableNonControllingInterestExchangeAgreementStockConversionRatio_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Redeemable Non Controlling Interest Exchange Agreement Stock Conversion Ratio</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_RedeemableNoncontrollingInterestTemporaryEquityRedemptionValue" xlink:type="locator" xlink:label="vtvt_RedeemableNoncontrollingInterestTemporaryEquityRedemptionValue" />
    <link:label xml:lang="en-US" xlink:label="vtvt_RedeemableNoncontrollingInterestTemporaryEquityRedemptionValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Redeemable noncontrolling interest temporary equity redemption value.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_RedeemableNoncontrollingInterestTemporaryEquityRedemptionValue" xlink:to="vtvt_RedeemableNoncontrollingInterestTemporaryEquityRedemptionValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_RedeemableNoncontrollingInterestTemporaryEquityRedemptionValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redemption amount of noncontrolling interest</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_RedeemableNoncontrollingInterestTemporaryEquityRedemptionValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Redeemable Noncontrolling Interest Temporary Equity Redemption Value</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent" xlink:type="locator" xlink:label="us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Increase in vTv Therapeutics Inc. accumulated deficit for purchase of LLC Units as a result of common stock issuances</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent" xlink:to="us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Changes Purchase Of Interest By Parent</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet" xlink:type="locator" xlink:label="us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Change from net loss attributable to vTv Therapeutics Inc. common shareholders and transfers to noncontrolling interest</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet" xlink:to="us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangeDueToNetIncomeAttributableToParentAndEffectsOfChangesNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Change Due To Net Income Attributable To Parent And Effects Of Changes Net</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_OwnershipPercentageOfMajorityOwner" xlink:type="locator" xlink:label="vtvt_OwnershipPercentageOfMajorityOwner" />
    <link:label xml:lang="en-US" xlink:label="vtvt_OwnershipPercentageOfMajorityOwner_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Ownership percentage of majority owner.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_OwnershipPercentageOfMajorityOwner" xlink:to="vtvt_OwnershipPercentageOfMajorityOwner_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_CommitmentContingencyAndRelatedPartyTransactionsAbstract" xlink:type="locator" xlink:label="vtvt_CommitmentContingencyAndRelatedPartyTransactionsAbstract" />
    <link:label xml:lang="en-US" xlink:label="vtvt_CommitmentContingencyAndRelatedPartyTransactionsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Commitment, Contingency And Related Party Transactions [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_CommitmentContingencyAndRelatedPartyTransactionsAbstract" xlink:to="vtvt_CommitmentContingencyAndRelatedPartyTransactionsAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_CommitmentContingencyAndRelatedPartyTransactionsAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Commitment Contingency And Related Party Transactions [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Related Party Transactions By Related Party [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Related Party Transactions By Related Party [Table]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_MacAndrewsAndForbesIncorporatedMember" xlink:type="locator" xlink:label="vtvt_MacAndrewsAndForbesIncorporatedMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_MacAndrewsAndForbesIncorporatedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">MacAndrews and Forbes Incorporated.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_MacAndrewsAndForbesIncorporatedMember" xlink:to="vtvt_MacAndrewsAndForbesIncorporatedMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_MacAndrewsAndForbesIncorporatedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">MacAndrews &amp; Forbes Incorporated [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_MacAndrewsAndForbesIncorporatedMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Mac Andrews And Forbes Incorporated [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transaction [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_RelatedPartyTransactionLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentsInAndAdvancesToAffiliatesBalanceShares" xlink:type="locator" xlink:label="us-gaap_InvestmentsInAndAdvancesToAffiliatesBalanceShares" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentsInAndAdvancesToAffiliatesBalanceShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares held by related party</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentsInAndAdvancesToAffiliatesBalanceShares" xlink:to="us-gaap_InvestmentsInAndAdvancesToAffiliatesBalanceShares_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_InvestmentsInAndAdvancesToAffiliatesBalanceShares_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Investments In And Advances To Affiliates Balance Shares</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_OwnershipPercentageOfMajorityOwner_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ownership percentage of majority owner</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_OwnershipPercentageOfMajorityOwner_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Ownership Percentage Of Majority Owner</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_LetterAgreementsExpirationDate" xlink:type="locator" xlink:label="vtvt_LetterAgreementsExpirationDate" />
    <link:label xml:lang="en-US" xlink:label="vtvt_LetterAgreementsExpirationDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Letter agreements expiration date.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_LetterAgreementsExpirationDate" xlink:to="vtvt_LetterAgreementsExpirationDate_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_ClassOfWarrantOrRightWarrantsExpirationDate" xlink:type="locator" xlink:label="vtvt_ClassOfWarrantOrRightWarrantsExpirationDate" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ClassOfWarrantOrRightWarrantsExpirationDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Class of warrant or right, warrants expiration date.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_ClassOfWarrantOrRightWarrantsExpirationDate" xlink:to="vtvt_ClassOfWarrantOrRightWarrantsExpirationDate_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_ClassOfWarrantOrRightNumberOfSharesIssuedForWarrantsOrRights" xlink:type="locator" xlink:label="vtvt_ClassOfWarrantOrRightNumberOfSharesIssuedForWarrantsOrRights" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ClassOfWarrantOrRightNumberOfSharesIssuedForWarrantsOrRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Class of warrant or right number of shares issued for warrants or rights.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_ClassOfWarrantOrRightNumberOfSharesIssuedForWarrantsOrRights" xlink:to="vtvt_ClassOfWarrantOrRightNumberOfSharesIssuedForWarrantsOrRights_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_ClassOfWarrantOrRightNumberOfRemainingSharesToBeIssued" xlink:type="locator" xlink:label="vtvt_ClassOfWarrantOrRightNumberOfRemainingSharesToBeIssued" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ClassOfWarrantOrRightNumberOfRemainingSharesToBeIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Class of warrant or right number of remaining shares to be issued.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_ClassOfWarrantOrRightNumberOfRemainingSharesToBeIssued" xlink:to="vtvt_ClassOfWarrantOrRightNumberOfRemainingSharesToBeIssued_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WarrantsAndRightsNoteDisclosureAbstract" xlink:type="locator" xlink:label="us-gaap_WarrantsAndRightsNoteDisclosureAbstract" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_WarrantsAndRightsNoteDisclosureAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Warrants And Rights Note Disclosure [Abstract]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantsAndRightsNoteDisclosureAbstract" xlink:to="us-gaap_WarrantsAndRightsNoteDisclosureAbstract_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfWarrantOrRightTable" xlink:type="locator" xlink:label="us-gaap_ClassOfWarrantOrRightTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class Of Warrant Or Right [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightTable" xlink:to="us-gaap_ClassOfWarrantOrRightTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transaction</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionAxis" xlink:to="us-gaap_RelatedPartyTransactionAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transaction</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="us-gaap_RelatedPartyTransactionDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RelatedPartyTransactionDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Domain]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_TwoThousandAndSeventeenLetterAgreementMember" xlink:type="locator" xlink:label="vtvt_TwoThousandAndSeventeenLetterAgreementMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_TwoThousandAndSeventeenLetterAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">December two thousand and seventeen letter agreement.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_TwoThousandAndSeventeenLetterAgreementMember" xlink:to="vtvt_TwoThousandAndSeventeenLetterAgreementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_TwoThousandAndSeventeenLetterAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2017 Letter Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_TwoThousandAndSeventeenLetterAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand And Seventeen Letter Agreement [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_TwoThousandAndEighteenLetterAgreementMember" xlink:type="locator" xlink:label="vtvt_TwoThousandAndEighteenLetterAgreementMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_TwoThousandAndEighteenLetterAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand and eighteen letter agreement.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_TwoThousandAndEighteenLetterAgreementMember" xlink:to="vtvt_TwoThousandAndEighteenLetterAgreementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_TwoThousandAndEighteenLetterAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2018 Letter Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_TwoThousandAndEighteenLetterAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand And Eighteen Letter Agreement [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_TwoThousandAndNineteenLetterAgreementMember" xlink:type="locator" xlink:label="vtvt_TwoThousandAndNineteenLetterAgreementMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_TwoThousandAndNineteenLetterAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand and nineteen letter agreement.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_TwoThousandAndNineteenLetterAgreementMember" xlink:to="vtvt_TwoThousandAndNineteenLetterAgreementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_TwoThousandAndNineteenLetterAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2019 Letter Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_TwoThousandAndNineteenLetterAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand And Nineteen Letter Agreement [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfWarrantOrRightLineItems" xlink:type="locator" xlink:label="us-gaap_ClassOfWarrantOrRightLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class Of Warrant Or Right [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightLineItems" xlink:to="us-gaap_ClassOfWarrantOrRightLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SecuritiesSoldUnderAgreementsToRepurchase" xlink:type="locator" xlink:label="us-gaap_SecuritiesSoldUnderAgreementsToRepurchase" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesSoldUnderAgreementsToRepurchase_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate dollar value to be sold under agreement</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SecuritiesSoldUnderAgreementsToRepurchase" xlink:to="us-gaap_SecuritiesSoldUnderAgreementsToRepurchase_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SecuritiesSoldUnderAgreementsToRepurchase_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Securities Sold Under Agreements To Repurchase</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharePrice" xlink:type="locator" xlink:label="us-gaap_SharePrice" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Specified purchase price per share</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharePrice" xlink:to="us-gaap_SharePrice_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SharePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Price</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_LetterAgreementsExpirationDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expiration date of letter agreement</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_LetterAgreementsExpirationDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Letter Agreements Expiration Date</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares available to be issued under related warrants</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Exercise price of related warrants</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ClassOfWarrantOrRightWarrantsExpirationDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expiration date of related warrants</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ClassOfWarrantOrRightWarrantsExpirationDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right Warrants Expiration Date</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ClassOfWarrantOrRightNumberOfSharesIssuedForWarrantsOrRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total shares issued as of December 31, 2021</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ClassOfWarrantOrRightNumberOfSharesIssuedForWarrantsOrRights_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right Number Of Shares Issued For Warrants Or Rights</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ClassOfWarrantOrRightNumberOfRemainingSharesToBeIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remaining shares to be issued as of December 31, 2021</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ClassOfWarrantOrRightNumberOfRemainingSharesToBeIssued_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right Number Of Remaining Shares To Be Issued</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_PercentageOfAmountOfCashSavings" xlink:type="locator" xlink:label="vtvt_PercentageOfAmountOfCashSavings" />
    <link:label xml:lang="en-US" xlink:label="vtvt_PercentageOfAmountOfCashSavings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of amount of cash savings.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_PercentageOfAmountOfCashSavings" xlink:to="vtvt_PercentageOfAmountOfCashSavings_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_TaxReceivableAgreementDescription" xlink:type="locator" xlink:label="vtvt_TaxReceivableAgreementDescription" />
    <link:label xml:lang="en-US" xlink:label="vtvt_TaxReceivableAgreementDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Description of tax receivable agreement.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_TaxReceivableAgreementDescription" xlink:to="vtvt_TaxReceivableAgreementDescription_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_PercentageOfAmountOfCashSavings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount of cash savings percentage</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_PercentageOfAmountOfCashSavings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Amount Of Cash Savings</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_TaxReceivableAgreementDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Description of tax receivable agreement</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_TaxReceivableAgreementDescription_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tax Receivable Agreement Description</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_CompensationAndEmployeeBenefitPlansAbstract" xlink:type="locator" xlink:label="vtvt_CompensationAndEmployeeBenefitPlansAbstract" />
    <link:label xml:lang="en-US" xlink:label="vtvt_CompensationAndEmployeeBenefitPlansAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Compensation and employee benefit plans.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_CompensationAndEmployeeBenefitPlansAbstract" xlink:to="vtvt_CompensationAndEmployeeBenefitPlansAbstract_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_CompensationAndEmployeeBenefitPlansAbstract_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Compensation And Employee Benefit Plans [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch" xlink:type="locator" xlink:label="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of employer contribution</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch" xlink:to="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Contribution Plan Employer Matching Contribution Percent Of Match</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent" xlink:type="locator" xlink:label="us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum annual contribution per employee</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent" xlink:to="us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Contribution Plan Maximum Annual Contributions Per Employee Percent</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount" xlink:type="locator" xlink:label="us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contributions made by employer</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount" xlink:to="us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Defined Contribution Plan Employer Discretionary Contribution Amount</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_IncomeTaxesLineItems" xlink:type="locator" xlink:label="vtvt_IncomeTaxesLineItems" />
    <link:label xml:lang="en-US" xlink:label="vtvt_IncomeTaxesLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Income taxes.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_IncomeTaxesLineItems" xlink:to="vtvt_IncomeTaxesLineItems_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_IncomeTaxesTable" xlink:type="locator" xlink:label="vtvt_IncomeTaxesTable" />
    <link:label xml:lang="en-US" xlink:label="vtvt_IncomeTaxesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Income taxes.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_IncomeTaxesTable" xlink:to="vtvt_IncomeTaxesTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_IncomeTaxesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Taxes [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_IncomeTaxesTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Income Taxes [Table]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_MFTTPHoldingsLLCMember" xlink:type="locator" xlink:label="vtvt_MFTTPHoldingsLLCMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_MFTTPHoldingsLLCMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">M&amp;F TTP Holdings LLC.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_MFTTPHoldingsLLCMember" xlink:to="vtvt_MFTTPHoldingsLLCMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_MFTTPHoldingsLLCMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">M&amp;F TTP Holdings LLC [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_MFTTPHoldingsLLCMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">M F T T P Holdings L L C [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TaxPeriodAxis" xlink:type="locator" xlink:label="us-gaap_TaxPeriodAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TaxPeriodAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax Period</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxPeriodAxis" xlink:to="us-gaap_TaxPeriodAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TaxPeriodAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tax Period [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TaxPeriodDomain" xlink:type="locator" xlink:label="us-gaap_TaxPeriodDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TaxPeriodDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax Period</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxPeriodDomain" xlink:to="us-gaap_TaxPeriodDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_TaxPeriodDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Tax Period [Domain]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_ExpireIn2035To2037Member" xlink:type="locator" xlink:label="vtvt_ExpireIn2035To2037Member" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ExpireIn2035To2037Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Expire in 2035 to 2037.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_ExpireIn2035To2037Member" xlink:to="vtvt_ExpireIn2035To2037Member_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ExpireIn2035To2037Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expire in 2035 to 2037 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ExpireIn2035To2037Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Expire In2035 To2037 [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_IndefiniteMember" xlink:type="locator" xlink:label="vtvt_IndefiniteMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_IndefiniteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Indefinite.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_IndefiniteMember" xlink:to="vtvt_IndefiniteMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_IndefiniteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Indefinite [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_IndefiniteMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Indefinite [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_ExpireIn2035To2040Member" xlink:type="locator" xlink:label="vtvt_ExpireIn2035To2040Member" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ExpireIn2035To2040Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Expire In 2035 To 2040.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_ExpireIn2035To2040Member" xlink:to="vtvt_ExpireIn2035To2040Member_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_ExpireIn2035To2040Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expire In 2035 to 2040 [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_ExpireIn2035To2040Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Expire In2035 To2040 [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TaxCreditCarryforwardAxis" xlink:type="locator" xlink:label="us-gaap_TaxCreditCarryforwardAxis" />
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    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxCreditCarryforwardAxis" xlink:to="us-gaap_TaxCreditCarryforwardAxis_lbl" />
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    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net deferred tax assets</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsNet" xlink:to="us-gaap_DeferredTaxAssetsNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_DeferredTaxAssetsNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Tax Assets Net</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" xlink:type="locator" xlink:label="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase in valuation allowance</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" xlink:to="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Allowance Deferred Tax Asset Change In Amount</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_OperatingLossCarryforwardsExpiringDate" xlink:type="locator" xlink:label="vtvt_OperatingLossCarryforwardsExpiringDate" />
    <link:label xml:lang="en-US" xlink:label="vtvt_OperatingLossCarryforwardsExpiringDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Operating loss carryforwards expiring date.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_OperatingLossCarryforwardsExpiringDate" xlink:to="vtvt_OperatingLossCarryforwardsExpiringDate_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_MaximumPercentageOfTaxableIncomeLimitedToOffsetByNetOperatingLossCarryforwads" xlink:type="locator" xlink:label="vtvt_MaximumPercentageOfTaxableIncomeLimitedToOffsetByNetOperatingLossCarryforwads" />
    <link:label xml:lang="en-US" xlink:label="vtvt_MaximumPercentageOfTaxableIncomeLimitedToOffsetByNetOperatingLossCarryforwads_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum percentage of taxable income limited to offset by net operating loss carryforwads.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_MaximumPercentageOfTaxableIncomeLimitedToOffsetByNetOperatingLossCarryforwads" xlink:to="vtvt_MaximumPercentageOfTaxableIncomeLimitedToOffsetByNetOperatingLossCarryforwads_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLossCarryforwards" xlink:type="locator" xlink:label="us-gaap_OperatingLossCarryforwards" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLossCarryforwards_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net operating loss carryforwards</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLossCarryforwards" xlink:to="us-gaap_OperatingLossCarryforwards_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLossCarryforwards_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Loss Carryforwards</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_OperatingLossCarryforwardsExpiringDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net operating loss carryforwards expiration date</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_OperatingLossCarryforwardsExpiringDate_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Loss Carryforwards Expiring Date</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLossCarryforwardsLimitationsOnUse" xlink:type="locator" xlink:label="us-gaap_OperatingLossCarryforwardsLimitationsOnUse" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLossCarryforwardsLimitationsOnUse_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net operating loss carryforwards, limitations on use</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLossCarryforwardsLimitationsOnUse" xlink:to="us-gaap_OperatingLossCarryforwardsLimitationsOnUse_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OperatingLossCarryforwardsLimitationsOnUse_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Operating Loss Carryforwards Limitations On Use</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_MaximumPercentageOfTaxableIncomeLimitedToOffsetByNetOperatingLossCarryforwads_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum percentage of taxable income limited to offset by net operating loss carryforwads.</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_MaximumPercentageOfTaxableIncomeLimitedToOffsetByNetOperatingLossCarryforwads_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Percentage Of Taxable Income Limited To Offset By Net Operating Loss Carryforwads</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_UnrecognizedTaxBenefits" xlink:type="locator" xlink:label="us-gaap_UnrecognizedTaxBenefits" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnrecognizedTaxBenefits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Uncertain tax positions</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrecognizedTaxBenefits" xlink:to="us-gaap_UnrecognizedTaxBenefits_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_UnrecognizedTaxBenefits_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Unrecognized Tax Benefits</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit" xlink:type="locator" xlink:label="us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase decrease in uncertain tax position reasonably possible</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit" xlink:to="us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Amount Of Unrecorded Benefit</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OpenTaxYear" xlink:type="locator" xlink:label="us-gaap_OpenTaxYear" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OpenTaxYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Earliest open tax year</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OpenTaxYear" xlink:to="us-gaap_OpenTaxYear_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_OpenTaxYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Open Tax Year</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_RestructuringInitiationMonthAndYear" xlink:type="locator" xlink:label="vtvt_RestructuringInitiationMonthAndYear" />
    <link:label xml:lang="en-US" xlink:label="vtvt_RestructuringInitiationMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Restructuring initiation month and year.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_RestructuringInitiationMonthAndYear" xlink:to="vtvt_RestructuringInitiationMonthAndYear_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_AdditionalSeveranceCosts" xlink:type="locator" xlink:label="vtvt_AdditionalSeveranceCosts" />
    <link:label xml:lang="en-US" xlink:label="vtvt_AdditionalSeveranceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Additional severance costs.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_AdditionalSeveranceCosts" xlink:to="vtvt_AdditionalSeveranceCosts_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_AdditionalConsultingFees" xlink:type="locator" xlink:label="vtvt_AdditionalConsultingFees" />
    <link:label xml:lang="en-US" xlink:label="vtvt_AdditionalConsultingFees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Additional consulting fees.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_AdditionalConsultingFees" xlink:to="vtvt_AdditionalConsultingFees_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:type="locator" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Restructuring And Related Costs [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:to="us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Restructuring And Related Costs [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanAxis" xlink:type="locator" xlink:label="us-gaap_RestructuringPlanAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringPlanAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restructuring Plan</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringPlanAxis" xlink:to="us-gaap_RestructuringPlanAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringPlanAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Plan [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanDomain" xlink:type="locator" xlink:label="us-gaap_RestructuringPlanDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringPlanDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restructuring Plan</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringPlanDomain" xlink:to="us-gaap_RestructuringPlanDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringPlanDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Plan [Domain]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_RetirementAndConsultingAgreementMember" xlink:type="locator" xlink:label="vtvt_RetirementAndConsultingAgreementMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_RetirementAndConsultingAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Retirement and consulting agreement.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_RetirementAndConsultingAgreementMember" xlink:to="vtvt_RetirementAndConsultingAgreementMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_RetirementAndConsultingAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retirement and Consulting Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_RetirementAndConsultingAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Retirement And Consulting Agreement [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:type="locator" xlink:label="us-gaap_RestructuringCostAndReserveLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringCostAndReserveLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restructuring Cost And Reserve [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringCostAndReserveLineItems" xlink:to="us-gaap_RestructuringCostAndReserveLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringCostAndReserveLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Cost And Reserve [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringReserve" xlink:type="locator" xlink:label="us-gaap_RestructuringReserve" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringReserve_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restructuring reserve</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringReserve" xlink:to="us-gaap_RestructuringReserve_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringReserve_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Reserve</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCosts" xlink:type="locator" xlink:label="us-gaap_RestructuringCosts" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restructuring costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestructuringCosts" xlink:to="us-gaap_RestructuringCosts_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Costs</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsForRestructuring" xlink:type="locator" xlink:label="us-gaap_PaymentsForRestructuring" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForRestructuring_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash payments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForRestructuring" xlink:to="us-gaap_PaymentsForRestructuring_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_PaymentsForRestructuring_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Payments For Restructuring</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_AdditionalSeveranceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional severance costs</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_AdditionalSeveranceCosts_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Additional Severance Costs</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_AdditionalConsultingFees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional consulting fees</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_AdditionalConsultingFees_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Additional Consulting Fees</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_RestructuringInitiationMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restructuring initiation month and year</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_RestructuringInitiationMonthAndYear_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Initiation Month And Year</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedInceptionToDatePercent" xlink:type="locator" xlink:label="us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedInceptionToDatePercent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedInceptionToDatePercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restructuring workforce employee affected percentage</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedInceptionToDatePercent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring And Related Cost Number Of Positions Eliminated Inception To Date Percent</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccruedEmployeeBenefitsCurrent" xlink:type="locator" xlink:label="us-gaap_AccruedEmployeeBenefitsCurrent" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccruedEmployeeBenefitsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued severance and benefits costs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedEmployeeBenefitsCurrent" xlink:to="us-gaap_AccruedEmployeeBenefitsCurrent_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AccruedEmployeeBenefitsCurrent_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Employee Benefits Current</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_DeemedDistributionToRelatedParty" xlink:type="locator" xlink:label="vtvt_DeemedDistributionToRelatedParty" />
    <link:label xml:lang="en-US" xlink:label="vtvt_DeemedDistributionToRelatedParty_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Deemed distribution to related party</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_DeemedDistributionToRelatedParty" xlink:to="vtvt_DeemedDistributionToRelatedParty_lbl" />
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    <link:label xml:lang="en-US" xlink:label="vtvt_NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Net income loss available to common stockholders basic and diluted.</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities Name [Domain]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_EmployeeStockOptionMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common Stock Options Granted Under the Plan [Member]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Stock Units [Member]</link:label>
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    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_EmployeeStockOptionsUnderLetterAgreementMember" xlink:type="locator" xlink:label="vtvt_EmployeeStockOptionsUnderLetterAgreementMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_EmployeeStockOptionsUnderLetterAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee stock options under letter agreement.</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_WarrantMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock Warrants [Member]</link:label>
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    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:type="locator" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" />
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    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_FairValueOfAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems" xlink:type="locator" xlink:label="vtvt_FairValueOfAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems" />
    <link:label xml:lang="en-US" xlink:label="vtvt_FairValueOfAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value of assets and liabilities measured on recurring basis.</link:label>
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    <link:label xml:lang="en-US" xlink:label="vtvt_FairValueOfAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value of assets and liabilities measured on recurring basis table.</link:label>
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    <link:label xml:lang="en-US" xlink:label="vtvt_FairValueOfAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Of Assets And Liabilities Measured On Recurring Basis [Table]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_FairValueOfAssetsAndLiabilitiesMeasuredOnRecurringBasisTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Of Assets And Liabilities Measured On Recurring Basis [Table]</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Inputs Level2 [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:type="locator" xlink:label="us-gaap_FairValueInputsLevel3Member" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Significant Unobservable Inputs (Level 3) [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel3Member" xlink:to="us-gaap_FairValueInputsLevel3Member_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Inputs Level3 [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_WarrantLiabilityRelatedPartyMember" xlink:type="locator" xlink:label="vtvt_WarrantLiabilityRelatedPartyMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_WarrantLiabilityRelatedPartyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrant liability, related party.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_WarrantLiabilityRelatedPartyMember" xlink:to="vtvt_WarrantLiabilityRelatedPartyMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_WarrantLiabilityRelatedPartyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant Liability, Related Party [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_WarrantLiabilityRelatedPartyMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Warrant Liability Related Party [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquitySecuritiesMember" xlink:type="locator" xlink:label="us-gaap_EquitySecuritiesMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EquitySecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Securities With Readily Determinable Fair Value [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquitySecuritiesMember" xlink:to="us-gaap_EquitySecuritiesMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_EquitySecuritiesMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Equity Securities [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_FairValueOfAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_FairValueOfAssetsAndLiabilitiesMeasuredOnRecurringBasisLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Of Assets And Liabilities Measured On Recurring Basis [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:type="locator" xlink:label="us-gaap_AssetsFairValueDisclosure" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsFairValueDisclosure" xlink:to="us-gaap_AssetsFairValueDisclosure_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Assets Fair Value Disclosure</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosure" xlink:type="locator" xlink:label="us-gaap_LiabilitiesFairValueDisclosure" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesFairValueDisclosure" xlink:to="us-gaap_LiabilitiesFairValueDisclosure_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities Fair Value Disclosure</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisWarrantLiabilityIssuance" xlink:type="locator" xlink:label="vtvt_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisWarrantLiabilityIssuance" />
    <link:label xml:lang="en-US" xlink:label="vtvt_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisWarrantLiabilityIssuance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value measurement with unobservable inputs reconciliation recurring basis warrant liability issuance.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisWarrantLiabilityIssuance" xlink:to="vtvt_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisWarrantLiabilityIssuance_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisWarrantLiabilitySales" xlink:type="locator" xlink:label="vtvt_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisWarrantLiabilitySales" />
    <link:label xml:lang="en-US" xlink:label="vtvt_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisWarrantLiabilitySales_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value measurement with unobservable inputs reconciliation recurring basis warrant liability sales.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisWarrantLiabilitySales" xlink:to="vtvt_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisWarrantLiabilitySales_lbl" />
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisWarrantLiability" xlink:type="locator" xlink:label="vtvt_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisWarrantLiability" />
    <link:label xml:lang="en-US" xlink:label="vtvt_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisWarrantLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair value measurement with unobservable inputs reconciliations recurring basis warrant liability.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisWarrantLiability" xlink:to="vtvt_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisWarrantLiability_lbl" />
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at January 1</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings" xlink:type="locator" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Change in fair value included in earnings</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings" xlink:to="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Earnings</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisWarrantLiabilityIssuance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchases / Issuance</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisWarrantLiabilityIssuance_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Warrant Liability Issuance</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisWarrantLiabilitySales_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Sales / Repurchases</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisWarrantLiabilitySales_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Warrant Liability Sales</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisWarrantLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at December 31,</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisWarrantLiability_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Warrant Liability</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet" xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value equity transfers in and out of level 3 instruments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Transfers Net</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueEquityLevel1ToLevel2TransfersAmount" xlink:type="locator" xlink:label="us-gaap_FairValueEquityLevel1ToLevel2TransfersAmount" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueEquityLevel1ToLevel2TransfersAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value equity transfers between level 1 and level 2 instruments</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueEquityLevel1ToLevel2TransfersAmount" xlink:to="us-gaap_FairValueEquityLevel1ToLevel2TransfersAmount_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_FairValueEquityLevel1ToLevel2TransfersAmount_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Equity Level1 To Level2 Transfers Amount</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_WeightedAverageMember" xlink:type="locator" xlink:label="srt_WeightedAverageMember" />
    <link:label xml:lang="en-US" xlink:label="srt_WeightedAverageMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_WeightedAverageMember" xlink:to="srt_WeightedAverageMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_WeightedAverageMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_WarrantsAndRightsOutstandingMeasurementInput_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Inputs utilized in the valuation of warrants</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTable" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTable" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event [Table]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_SubsequentEventTable_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTable_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Table]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_StatementScenarioAxis" xlink:type="locator" xlink:label="srt_StatementScenarioAxis" />
    <link:label xml:lang="en-US" xlink:label="srt_StatementScenarioAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Scenario</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_StatementScenarioAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_StatementScenarioAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Statement Scenario [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ScenarioUnspecifiedDomain" xlink:type="locator" xlink:label="srt_ScenarioUnspecifiedDomain" />
    <link:label xml:lang="en-US" xlink:label="srt_ScenarioUnspecifiedDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Scenario</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="srt_ScenarioUnspecifiedDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ScenarioUnspecifiedDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Scenario Unspecified [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ScenarioForecastMember" xlink:type="locator" xlink:label="srt_ScenarioForecastMember" />
    <link:label xml:lang="en-US" xlink:label="srt_ScenarioForecastMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forecast [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ScenarioForecastMember" xlink:to="srt_ScenarioForecastMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="srt_ScenarioForecastMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Scenario Forecast [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_StrategicAdvisorMember" xlink:type="locator" xlink:label="vtvt_StrategicAdvisorMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_StrategicAdvisorMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Strategic advisor.</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="vtvt_StrategicAdvisorMember" xlink:to="vtvt_StrategicAdvisorMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="vtvt_StrategicAdvisorMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Strategic Advisor [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_StrategicAdvisorMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Strategic Advisor [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTypeAxis" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeAxis_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:type="locator" xlink:label="us-gaap_SubsequentEventTypeDomain" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event Type</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventTypeDomain_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventMember" xlink:type="locator" xlink:label="us-gaap_SubsequentEventMember" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event [Member]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventMember" xlink:to="us-gaap_SubsequentEventMember_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Member]</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_NelsonEmploymentAgreementMember" xlink:type="locator" xlink:label="vtvt_NelsonEmploymentAgreementMember" />
    <link:label xml:lang="en-US" xlink:label="vtvt_NelsonEmploymentAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Nelson Employment Agreement.</link:label>
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    <link:label xml:lang="en-US" xlink:label="vtvt_NelsonEmploymentAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Nelson Employment Agreement [Member]</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_NelsonEmploymentAgreementMember_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Nelson Employment Agreement [Member]</link:label>
    <link:loc xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventLineItems" xlink:type="locator" xlink:label="us-gaap_SubsequentEventLineItems" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event [Line Items]</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_SubsequentEventLineItems_lbl" />
    <link:label xml:lang="en-US" xlink:label="us-gaap_SubsequentEventLineItems_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Line Items]</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Outstanding stock options</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Stock options, award vesting period</link:label>
    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_OptionsVestRatablyEveryThreeMonthsOverVestingPeriod" xlink:type="locator" xlink:label="vtvt_OptionsVestRatablyEveryThreeMonthsOverVestingPeriod" />
    <link:label xml:lang="en-US" xlink:label="vtvt_OptionsVestRatablyEveryThreeMonthsOverVestingPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Options vest ratably every three months over vesting period.</link:label>
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    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_CashBonusOfBaseSalaryPercentage" xlink:type="locator" xlink:label="vtvt_CashBonusOfBaseSalaryPercentage" />
    <link:label xml:lang="en-US" xlink:label="vtvt_CashBonusOfBaseSalaryPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash bonus of base salary percentage.</link:label>
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    <link:loc xlink:href="vtvt-20211231.xsd#vtvt_MinimumAmountOfBaseSalary" xlink:type="locator" xlink:label="vtvt_MinimumAmountOfBaseSalary" />
    <link:label xml:lang="en-US" xlink:label="vtvt_MinimumAmountOfBaseSalary_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation">Minimum amount of base salary.</link:label>
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    <link:label xml:lang="en-US" xlink:label="vtvt_MinimumAmountOfBaseSalary_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum amount of base salary</link:label>
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    <link:label xml:lang="en-US" xlink:label="vtvt_CashBonusOfBaseSalaryPercentage_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Cash Bonus Of Base Salary Percentage</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Stock options granted in period</link:label>
    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Stock options exercise price</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock options will vest on effective date</link:label>
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    <link:label xml:lang="en-US" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_OptionsVestRatablyEveryThreeMonthsOverVestingPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Options vest ratably every three months over vesting period</link:label>
    <link:label xml:lang="en-US" xlink:label="vtvt_OptionsVestRatablyEveryThreeMonthsOverVestingPeriod_lbl" xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label">Options Vest Ratably Every Three Months Over Vesting Period</link:label>
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</link:linkbase>
