You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2,2-dimethyl-4-oxo-N-(3-oxo-1,4-diphenylbutan-2-yl)-4-[1-(pyrrolidine-2-carbonyl)pyrrolidin-2-yl]butanamide into its molecular formula.
user
C31H39N3O4
assistant