Synonyms: 1,3,4-Metheno-2H-cyclobuta[cd]pentalen-2-one,decachlorooctahydro- (6CI);1,1a,3,3a,4,5,5,5a,5b,6-Decachlorooctahydro-1,3,4-metheno-2H-cyclobuta[cd]pentalen-2-one;Chlordecone; Clordecone; Compound 1189; Decachloroketone;Decachlorooctahydro-1,3,4-metheno-2H-cyclobuta[cd]pentalen-2-one;Decachloropentacyclo[5.2.1.02,6.03,9.05,8]decan-4-one; ENT-16391; GC 1189;Kepone; NSC 124074; NSC 56532