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 [(2S)-1-(3-cyanoanilino)-1-oxopropan-2-yl] (3R)-1-(2-ethylphenyl)-5-oxopyrrolidine-3-carboxylate .
user
C23H23N3O4
assistant