2,2',3,4,6,6'-hexachloro-3-methoxy-1,1'-biphenyl

2,2',4,4',6,6'-hexachloro-3,3'-dimethoxy-1,1'-biphenyl

2,2',3',5,6,6'-hexachloro-3,4-dimethoxy-1,1'-biphenyl

2,3,3,4,5,6-六氯联苯

2,3,3',5',6-五氯联苯