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For the molecule named methyl (2S,3aS,3'aS,6S,6'R,6'aS)-6'-[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl]-2',2'-dimethylspiro[3,3a,4,5-tetrahydro-2H-pyrrolo[1,2-b][1,2]oxazole-6,4'-6,6a-dihydro-3aH-furo[3,4-d][1,3]dioxole]-2-carboxylate by IUPAC nomenclature, provide its molecular formula.
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C19H29NO8
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