You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-[(E)-[[2-(2,5-dichloroanilino)-2-oxoacetyl]hydrazinylidene]methyl]phenyl] 4-methoxybenzoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H17Cl2N3O5
assistant