You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(3-bromophenyl)methyl]-4-(4-chloro-N-methylsulfonylanilino)-N-[(2S)-1-(2-methylpropylamino)-1-oxo-3-phenylpropan-2-yl]butanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C31H37BrClN3O4S
assistant