You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-(3-chloro-4-methoxyanilino)-4-(4-chlorophenyl)-1-[(4-methylphenyl)methyl]pyrrole-2,5-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H20Cl2N2O3
assistant