You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[[[2-(3-chloro-2-methyl-N-(4-methylphenyl)sulfonylanilino)acetyl]amino]methyl]pyridine-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H23ClN4O4S
assistant