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  <xs:element id="ttrx_NumberOfWarrantsAmendedForPurchase" name="NumberOfWarrantsAmendedForPurchase" 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_AmountsPayableForOutstandingLegalServices" name="AmountsPayableForOutstandingLegalServices" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xs:element id="ttrx_CumulativeGrantDateFairValueOfOptionsGranted" name="CumulativeGrantDateFairValueOfOptionsGranted" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <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_TwoThousandTwentyFourStockOptionPlanMember" name="TwoThousandTwentyFourStockOptionPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="ttrx_DavisPolkMember" name="DavisPolkMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="ttrx_FairValueOfContingentConversion" name="FairValueOfContingentConversion" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
</xs:schema>
