You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 2-[(4-methoxyphenyl)methyl]-8-[2-oxo-1-[(3S,4S)-4-phenylpyrrolidin-3-yl]butyl]-2,8-diazaspiro[4.5]decan-1-one ?
user
C30H39N3O3
assistant