You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3R,5R,8R,9S,10S,12S,13R,14S,17R)-10,13-dimethyl-17-[(2S)-4-(6-methyl-1H-benzimidazol-2-yl)butan-2-yl]-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,12-diol by IUPAC nomenclature, provide its molecular formula.
user
C31H46N2O2
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