1,1'-Biphenyl, 2,2',5,5'-tetrachloro-4,4'-diiodo-;2,2',5,5'-Tetrachloro-4,4'-diiodo-1,1'-biphenyl;2,2',5,5'-Tetrachloro-4,4'-diiodobiphenyl;4,4'-Diiodo-2,2',5,5'-tetrachlorobiphenyl
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