2,2',3,3',4,5,5',6'-Octachlorobiphenyl;2,2',3,3',4',5,5',6-Octachloro-1,1'-biphenyl; 2,2',3,3',4',5,5',6-Octachlorobiphenyl;2,3,4,5,2',3',5',6'-Octachlorobiphenyl; 2,3,5,6,2',3',4',5'-Octachlorobiphenyl;PCB 199
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