You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule cyclopentyl (3S)-3-[[2-[(4-methoxyphenyl)methyl]-1-oxo-2,8-diazaspiro[4.5]decan-8-yl]methyl]-4-phenylpyrrolidine-1-carboxylate .
user
C33H43N3O4
assistant