You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 5-[(3-chloro-2-methylphenyl)carbamoyl]-4-methyl-2-[(2-methylbenzoyl)amino]thiophene-3-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H21ClN2O4S
assistant