You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3S,5S,8R,9S,10S,13S,14S,16S,17R)-10,13-dimethyl-17-[(1S)-1-[(2R,5S)-5-methylpiperidin-2-yl]ethyl]-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,16-diol by IUPAC nomenclature, provide its molecular formula.
user
C27H47NO2
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