You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[4-(3,4-dimethyl-N-methylsulfonylanilino)butanoyl-[(3-methylphenyl)methyl]amino]-N-propylbutanamide by IUPAC nomenclature, provide its molecular formula.
user
C28H41N3O4S
assistant