You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4Z)-1-(4-chlorophenyl)-5-[4-(diethylamino)phenyl]-4-[(4-ethoxy-3-methylphenyl)-hydroxymethylidene]pyrrolidine-2,3-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C30H31ClN2O4
assistant