You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-butan-2-yl-2-[(4-chlorophenyl)methyl-[2-(2-ethyl-N-methylsulfonylanilino)acetyl]amino]propanamide into molecular formula.
user
C25H34ClN3O4S
assistant