You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3S,5R,9R,10R,13R,14S)-17-[(2R,4S)-4,6-dihydroxy-6-methylheptan-2-yl]-3,14-dihydroxy-10,13-dimethyl-2,3,4,5,9,11,12,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-6-one by IUPAC nomenclature, provide its molecular formula.
user
C27H44O5
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