You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S)-2-[(2-chlorophenyl)methyl-[2-(N-(4-ethoxyphenyl)sulfonylanilino)acetyl]amino]-N-(2-methylpropyl)butanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C31H38ClN3O5S
assistant