4-Chloro-2-(4-chloro-2-fluorophenyl)-5-((4-chlorophenyl)methoxy)-3(2H)-pyridazinone , its CAS NO. is 107359-74-0, the synonyms are 3(2H)-Pyridazinone, 4-chloro-2-(4-chloro-2-fluorophenyl)-5-((4-chlorophenyl)methoxy)- .