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    <element id="nthi_RelatedPartyLoansPayableDisclosureTextBlock" name="RelatedPartyLoansPayableDisclosureTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_DisclosureCommonAndPreferredStockAbstract" name="DisclosureCommonAndPreferredStockAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_CommonAndPreferredStockDisclosureTextBlock" name="CommonAndPreferredStockDisclosureTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_DisclosureStockbasedCompensationAbstract" name="DisclosureStockbasedCompensationAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_ShareBasedCompensationDisclosureTextBlock" name="ShareBasedCompensationDisclosureTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_DeferredOfferingCostsPoliciesTextBlock" name="DeferredOfferingCostsPoliciesTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_WarrantsPoliciesTextBlock" name="WarrantsPoliciesTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_PatentCostsPoliciesTextBlock" name="PatentCostsPoliciesTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_ScheduleOfProceedsFromSaleOfCommonStockTableTextBlock" name="ScheduleOfProceedsFromSaleOfCommonStockTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_EscrowReleased" name="EscrowReleased" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_UpfrontPayment" name="UpfrontPayment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_AmendmentFees" name="AmendmentFees" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_AdvisoryFeeExpense" name="AdvisoryFeeExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_AdvisoryFeePaid" name="AdvisoryFeePaid" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_AnnualPatentMaintenanceFee" name="AnnualPatentMaintenanceFee" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_RoyaltiesPercentage" name="RoyaltiesPercentage" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_UtilizesLaboratoryAndPatentMaintenanceServices" name="UtilizesLaboratoryAndPatentMaintenanceServices" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_UtilizesLaboratoryAndPatentMaintenanceServicesPayable" name="UtilizesLaboratoryAndPatentMaintenanceServicesPayable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_AccruedCompensation" name="AccruedCompensation" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_OriginalIssueDiscount" name="OriginalIssueDiscount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_MaximumBorrowing" name="MaximumBorrowing" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_DueFromRelatedParty" name="DueFromRelatedParty" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_BaseRent" name="BaseRent" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_LeaseIncreasesPercentage" name="LeaseIncreasesPercentage" nillable="true" xbrli:periodType="duration" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_CashPaidForAmountsIncludedInMeasurementOfLeaseLiability" name="CashPaidForAmountsIncludedInMeasurementOfLeaseLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_GrossProceedsFromSaleOfCommonStock" name="GrossProceedsFromSaleOfCommonStock" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_ReclassificationOfDeferredOfferingCostsToApicAtCompletionOfOffering" name="ReclassificationOfDeferredOfferingCostsToApicAtCompletionOfOffering" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_ReleaseOfRestrictedStockUnits" name="ReleaseOfRestrictedStockUnits" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_PrivatePlacementDescription" name="PrivatePlacementDescription" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_PlacementAgentFees" name="PlacementAgentFees" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_AdvisoryServicesFees" name="AdvisoryServicesFees" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_DeferredOfferingCostsIncurred" name="DeferredOfferingCostsIncurred" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_ClinicalTrialExpense" name="ClinicalTrialExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_InvestorRelations" name="InvestorRelations" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_ReleasedRestrictedStockUnits" name="ReleasedRestrictedStockUnits" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_FairValueOfRsus" name="FairValueOfRsus" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_RestrictedStockUnitsRemainUnissued" name="RestrictedStockUnitsRemainUnissued" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_NumberOfWarrantsToPurchase" name="NumberOfWarrantsToPurchase" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_WarrantsIssued" name="WarrantsIssued" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_WarrantsVested" name="WarrantsVested" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_WarrantsExercised" name="WarrantsExercised" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="nthi_LeaseCommencementDate" name="LeaseCommencementDate" nillable="true" xbrli:periodType="duration" type="xbrli:dateItemType" substitutionGroup="xbrli:item" />
</schema>
