You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2R,6R)-2-methyl-6-[(7S,8S,9S,10R,13R,14S,17R)-3,3,7-trihydroxy-10,13-dimethyl-1,2,4,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl]heptanoic acid into molecular formula.
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C27H44O5
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