You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3-[(7S)-7-[(5aR,5bR,10R,11aS,13bS)-5a,5b,8,8,10,11a,13b-heptamethyl-1,2,3,3a,4,5,6,7,7a,9,10,11,11b,12,13,13a-hexadecahydrocyclopenta[a]chrysen-3-yl]-2,3,4-trihydroxyoctoxy]-4,8-dihydroxy-2,6-dioxabicyclo[3.2.1]octan-7-one by IUPAC nomenclature, provide its molecular formula.
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C42H70O9
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