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  <xs:element id="ttrx_EmergingGrowthCompanyStatusPolicyTextBlock" name="EmergingGrowthCompanyStatusPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ttrx_CommonStockWarrantsMember" name="CommonStockWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="ttrx_StockIssuedDuringPeriodExercisedOfWarrant" name="StockIssuedDuringPeriodExercisedOfWarrant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xs:element id="ttrx_NumberOfWarrantsIssuedToCertainInvestors" name="NumberOfWarrantsIssuedToCertainInvestors" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xs:element id="ttrx_ScheduleOfCommonStockWarrantsWereOutstandingTableTextBlock" name="ScheduleOfCommonStockWarrantsWereOutstandingTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ttrx_ScheduleOfCommonStockReservedTableTextBlock" name="ScheduleOfCommonStockReservedTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ttrx_ThousandTwentyFiveRegulationDOfferingMember" name="ThousandTwentyFiveRegulationDOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="ttrx_ThousandTwentyFiveRegulationAOfferingMember" name="ThousandTwentyFiveRegulationAOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="ttrx_NumberOfWarrantsAmendedForPurchase" name="NumberOfWarrantsAmendedForPurchase" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xs:element id="ttrx_MinimumInvestmentForAccreditedInvestors" name="MinimumInvestmentForAccreditedInvestors" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="ttrx_TrancheOneMember" name="TrancheOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="ttrx_TrancheTwoMember" name="TrancheTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="ttrx_PercentageOfPrincipalPrepaymentOccursAfterSecondAnniversary" name="PercentageOfPrincipalPrepaymentOccursAfterSecondAnniversary" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ttrx_LoanAndSecurityAgreementMember" name="LoanAndSecurityAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="ttrx_DiscretionaryTrancheThreeMember" name="DiscretionaryTrancheThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="ttrx_FirstAnniversaryMember" name="FirstAnniversaryMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="ttrx_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsEstimatedForfeitureRatesForOptionsGranted" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsEstimatedForfeitureRatesForOptionsGranted" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ttrx_ScheduleOfAssumptionsToEstimateStockBasedCompensationExpenseTable" name="ScheduleOfAssumptionsToEstimateStockBasedCompensationExpenseTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="ttrx_TwoThousandEighteenStockOptionPlanMember" name="TwoThousandEighteenStockOptionPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="ttrx_LicensingAgreementsTextBlock" name="LicensingAgreementsTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ttrx_EquityFinancingMember" name="EquityFinancingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="ttrx_FinalPrincipleAmountRate" name="FinalPrincipleAmountRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ttrx_AvenueVentureOpportunitiesFundMember" name="AvenueVentureOpportunitiesFundMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="ttrx_MonteCarloSimulationMember" name="MonteCarloSimulationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="ttrx_BlackScholesOptionValuationModelMember" name="BlackScholesOptionValuationModelMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
</xs:schema>
