You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 4-(3,4-dichlorophenyl)-2-[1-[2-(3,4-dichlorophenyl)phenyl]ethyl]pyridazin-3-one using the IUPAC nomenclature.
user
C24H16Cl4N2O
assistant