You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 1-(4-butylphenyl)-5-oxo-N-[4-[2-oxo-2-(propan-2-ylamino)ethyl]phenyl]pyrrolidine-3-carboxamide .
user
C26H33N3O3
assistant