You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-cyclopentylimino-9-(cyclopropylmethyl)-1-(3-methoxyphenyl)-1,3,9-triazaspiro[4.5]decan-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H32N4O2
assistant