You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(2S)-1-(tert-butylamino)-1-oxopropan-2-yl]-N-[(3,4-dichlorophenyl)methyl]-4-(4-ethyl-N-methylsulfonylanilino)butanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H37Cl2N3O4S
assistant