You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2S)-2-[[2-(3-acetyl-N-methylsulfonylanilino)acetyl]-[(3-methylphenyl)methyl]amino]-N-propylbutanamide by IUPAC nomenclature, provide its molecular formula.
user
C26H35N3O5S
assistant