You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[[4-(3-methoxyphenyl)-1-[(4-nitrophenyl)methyl]pyrrolidin-3-yl]methyl]-N-(2-methylpropyl)benzamide by IUPAC nomenclature, provide its molecular formula.
user
C30H35N3O4
assistant