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    <element id="SBFM_MayPreFundedWarrantsMember" name="MayPreFundedWarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_MayInvestorWarrantsMember" name="MayInvestorWarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_PreFunded2024WarrantsMember" name="PreFunded2024WarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_SeriesAWarrantsMember" name="SeriesAWarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_PreFunded2025WarrantsMember" name="PreFunded2025WarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_SeriesCWarrantsMember" name="SeriesCWarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_PreFunded2026WarrantsMember" name="PreFunded2026WarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_AprilWarrantsAndMayInvestorWarrantsMember" name="AprilWarrantsAndMayInvestorWarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_TradeableWarrants1Member" name="TradeableWarrants1Member" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_InvestorWarrants1Member" name="InvestorWarrants1Member" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_SeriesBWarrants1Member" name="SeriesBWarrants1Member" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_SeriesCWarrants1Member" name="SeriesCWarrants1Member" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_ReleaseAgreementMember" name="ReleaseAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_EarnoutPayable" name="EarnoutPayable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_IncreaseDecreaseInReductionInRightofuseAsset" name="IncreaseDecreaseInReductionInRightofuseAsset" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_ExerciseOfSeriesBWarrants" name="ExerciseOfSeriesBWarrants" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_ExerciseOfSeriesBWarrantsShares" name="ExerciseOfSeriesBWarrantsShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_ExerciseOfSeriesCWarrants" name="ExerciseOfSeriesCWarrants" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_ExerciseOfSeriesCWarrantsShares" name="ExerciseOfSeriesCWarrantsShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_DisclosureReverseStockSplitsAbstract" name="DisclosureReverseStockSplitsAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_ReverseStockSplitTextBlock" name="ReverseStockSplitTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_DisclosureLeasesAbstract" name="DisclosureLeasesAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_DisclosureManagementAndDirectorCompensationAbstract" name="DisclosureManagementAndDirectorCompensationAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_CompensationRelatedCostsDisclosureTextBlock" name="CompensationRelatedCostsDisclosureTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_DisclosureWarrantsAbstract" name="DisclosureWarrantsAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_WarrantsDisclosureTextBlock" name="WarrantsDisclosureTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_ScheduleOfWarrantsIssuedWithFinancingTableTextBlock" name="ScheduleOfWarrantsIssuedWithFinancingTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_EarnoutLiabilityExpenseFirstInstallment" name="EarnoutLiabilityExpenseFirstInstallment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_EarnoutLiabilityExpenseSecondInstallment" name="EarnoutLiabilityExpenseSecondInstallment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_EarnoutLiabilityBalance" name="EarnoutLiabilityBalance" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_AllowanceForObsoleteInventory" name="AllowanceForObsoleteInventory" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_LesseeOperatingLeasesRemainingLeaseTerm" name="LesseeOperatingLeasesRemainingLeaseTerm" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_UnitDescription" name="UnitDescription" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_WarrantExpirationDate" name="WarrantExpirationDate" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="SBFM_WarrantsExercisedShares" name="WarrantsExercisedShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
</schema>
