You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-(5-chloro-2-methyl-N-methylsulfonylanilino)-N-[(4-methoxyphenyl)methyl]-N-[1-oxo-1-(propan-2-ylamino)propan-2-yl]butanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H36ClN3O5S
assistant