You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(3S)-1-[1-[(3-methylphenyl)methyl]piperidin-4-yl]piperidin-3-yl]-pyrrolidin-1-ylmethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H35N3O
assistant