You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 3-chloro-1-(3-chloro-4-methylphenyl)-2-(dichloromethylidene)-5-oxopyrrolidine-3-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C14H11Cl4NO3
assistant