You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-(3,4-dimethyl-N-methylsulfonylanilino)-N-[(3-methoxyphenyl)methyl]-N-[(2R)-1-oxo-1-(propylamino)propan-2-yl]butanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H39N3O5S
assistant