2,2,7,7-tetrachloro-4,5-dimethylcyclohept-4-en-1-one 4-cyclohepten-1-one, 2,2,7,7-tetrachloro-4,5-dimethyl- InChI=1/C9H10Cl4O/c1-5-3-8(10,11)7(14)9(12,13)4-6(5)2/h3-4H2,1-2H