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 2-[(3R,3aR,5aS,6R,7E,9aS,9bS)-7-hydroxyimino-3a,6-dimethyl-3-[(2R)-6-methylheptan-2-yl]-1,2,3,4,5,5a,8,9,9a,9b-decahydrocyclopenta[a]naphthalen-6-yl]ethanol ?
user
C25H45NO2
assistant