You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(3-chloro-4-methyl-N-(4-methylphenyl)sulfonylanilino)-N-(2-naphthalen-2-yloxyethyl)acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H27ClN2O4S
assistant