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  <xs:element id="tars_AdditionalStockToBeIssuedOnEighteenMonthAgreementAnniversarySharePriceIssuedForServices" abstract="false" name="AdditionalStockToBeIssuedOnEighteenMonthAgreementAnniversarySharePriceIssuedForServices" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:perShareItemType"/>
  <xs:element id="tars_DebtInstrumentConvertibleConversionPricePercentageOfIssuancePrice" abstract="false" name="DebtInstrumentConvertibleConversionPricePercentageOfIssuancePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="tars_StockIssuedDuringPeriodValueVestingOfFounderShares" abstract="false" name="StockIssuedDuringPeriodValueVestingOfFounderShares" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tars_ClinicalMilestonesMember" abstract="true" name="ClinicalMilestonesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tars_ConvertiblePreferredStockVotingRightsIfCertainStockRemainsOutstandingNumberOfDirectors" abstract="false" name="ConvertiblePreferredStockVotingRightsIfCertainStockRemainsOutstandingNumberOfDirectors" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="tars_CommonStockNumberOfVotes" abstract="false" name="CommonStockNumberOfVotes" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="tars_LesseeOperatingLeaseNumberOfLeaseContractsEnteredDuringPeriod" abstract="false" name="LesseeOperatingLeaseNumberOfLeaseContractsEnteredDuringPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="tars_ProceedsFromEarlyExerciseOfStockOptions" abstract="false" name="ProceedsFromEarlyExerciseOfStockOptions" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tars_DeferredOfferingCostsIncurredButNotYetPaid" abstract="false" name="DeferredOfferingCostsIncurredButNotYetPaid" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tars_EquityIncentivePlan2020Member" abstract="true" name="EquityIncentivePlan2020Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tars_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues" abstract="false" name="TemporaryEquityStockIssuedDuringPeriodSharesNewIssues" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tars_AdditionalStockToBeIssuedOnEighteenMonthAgreementAnniversaryValueIssuedForServices" abstract="false" name="AdditionalStockToBeIssuedOnEighteenMonthAgreementAnniversaryValueIssuedForServices" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tars_SeriesBAndCPreferredStockMember" abstract="true" name="SeriesBAndCPreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tars_PreferredStockConversionRatio" abstract="false" name="PreferredStockConversionRatio" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="tars_August2019NotesMember" abstract="true" name="August2019NotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tars_OtherFacilityLeasesMember" abstract="true" name="OtherFacilityLeasesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tars_EquityIncentivePlan2016Member" abstract="true" name="EquityIncentivePlan2016Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tars_May2019NotesMember" abstract="true" name="May2019NotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tars_CommonStockCapitalSharesReservedForFutureIssuanceAnnualPercentageIncrease" abstract="false" name="CommonStockCapitalSharesReservedForFutureIssuanceAnnualPercentageIncrease" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="tars_StockIssuanceCostsIncurredButNotYetPaid" abstract="false" name="StockIssuanceCostsIncurredButNotYetPaid" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tars_RepurchaseOfStockOptionsShares" abstract="false" name="RepurchaseOfStockOptionsShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tars_AdditionalStockToBeIssuedOnEighteenMonthAgreementAnniversarySharesIssuedForServices" abstract="false" name="AdditionalStockToBeIssuedOnEighteenMonthAgreementAnniversarySharesIssuedForServices" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tars_CommonStockCapitalSharesReservedForFutureIssuanceEffectOfStockOptionsAvailableForFutureGrant" abstract="false" name="CommonStockCapitalSharesReservedForFutureIssuanceEffectOfStockOptionsAvailableForFutureGrant" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tars_LesseeOperatingLeaseNumberOfLeaseContracts" abstract="false" name="LesseeOperatingLeaseNumberOfLeaseContracts" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="tars_StockIssuedDuringPeriodSharesLapseOfRepurchaseRights" abstract="false" name="StockIssuedDuringPeriodSharesLapseOfRepurchaseRights" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tars_ConvertiblePreferredStockNumberOfVotes" abstract="false" name="ConvertiblePreferredStockNumberOfVotes" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="tars_CommonStockCapitalSharesReservedForFutureIssuanceEffectOfStockOptionsIssuedAndOutstanding" abstract="false" name="CommonStockCapitalSharesReservedForFutureIssuanceEffectOfStockOptionsIssuedAndOutstanding" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tars_NumberOfEmploymentArrangementsWithExecutiveOfficers" abstract="false" name="NumberOfEmploymentArrangementsWithExecutiveOfficers" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="tars_ShareBasedPaymentArrangementOptionEarlyExercisedAndUnvestedMember" abstract="true" name="ShareBasedPaymentArrangementOptionEarlyExercisedAndUnvestedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tars_AccruedClinicalStudiesCurrent" abstract="false" name="AccruedClinicalStudiesCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tars_CommonStockVotingRightsNumberOfDirectors" abstract="false" name="CommonStockVotingRightsNumberOfDirectors" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="tars_ShareBasedPaymentArrangementOptionVestedAndUnvestedMember" abstract="true" name="ShareBasedPaymentArrangementOptionVestedAndUnvestedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tars_NoncashInterestExpenseRelatedParty" abstract="false" name="NoncashInterestExpenseRelatedParty" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tars_CommonStockSharesSubjectToRepurchase" abstract="false" name="CommonStockSharesSubjectToRepurchase" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tars_CollaborativeArrangementMaximumMilestonePayment" abstract="false" name="CollaborativeArrangementMaximumMilestonePayment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tars_StockIssuedDuringPeriodSharesVestingOfFounderShares" abstract="false" name="StockIssuedDuringPeriodSharesVestingOfFounderShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tars_ConvertiblePreferredStockMandatoryConversionToCommonStockPublicOfferingMinimumValue" abstract="false" name="ConvertiblePreferredStockMandatoryConversionToCommonStockPublicOfferingMinimumValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tars_IrvineOfficeAndFacilitiesLeaseMember" abstract="true" name="IrvineOfficeAndFacilitiesLeaseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
</xs:schema>
