You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(4-chlorophenyl)methyl]-8-[cyclobuten-1-yl-[(3R)-1-(2-cyclopropylacetyl)-4-phenylpyrrolidin-3-yl]methyl]-2,8-diazaspiro[4.5]decan-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C35H42ClN3O2
assistant