You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by (3S,5S,8S,9R,10S,13S,14R,17S)-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]phenanthren-3-ol ?
user
C31H46N2O
assistant