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 (4bR,6aR,8R,10aS,10bS,12aS)-8-hydroxy-10a,12a-dimethyl-3,4,4a,4b,5,6,6a,7,8,9,10,10b,11,12-tetradecahydro-2H-chrysen-1-one ?
user
C20H32O2
assistant