You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(4-chlorophenyl)methyl]-N-[(2S)-1-oxo-3-phenyl-1-(propylamino)propan-2-yl]butanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H29ClN2O2
assistant