You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-2-[(2-chlorophenyl)methyl-[4-(2,5-dimethyl-N-methylsulfonylanilino)butanoyl]amino]-N-propylbutanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H38ClN3O4S
assistant