You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2R)-2-[benzyl-[2-(3-methyl-N-methylsulfonylanilino)acetyl]amino]-N-[(2R)-butan-2-yl]butanamide into its molecular formula.
user
C25H35N3O4S
assistant