1,3,3,4,4,5,5,6,6-nonafluoro-2-(2,3,4,5,6-pentafluorophenyl)cyclohexene

perfluoro-3,3',4,4',5,5',6,6'-octahydrobiphenyl

perfluoro-3,3',4,5,6,6'-hexahydrobiphenyl

1,2,4,5-tetrafluoro-3,6-bis(2,3,5,6-tetrafluorophenyl)benzene

1,1'-Biphenyl, 2,2',3,3',5,5',6,6'-octafluoro-4,4'-bis(trifluoromethyl)-