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)-2-[[2-(2-methyl-N-(4-methylphenyl)sulfonylanilino)acetyl]-(2-phenylethyl)amino]-N-propan-2-ylbutanamide .
user
C31H39N3O4S
assistant