4,4'-(PROPANE-1,1-DIYL)BIS(1,5-DIMETHYL-2-PHENYL-1H-PYRAZOLE-3(2H)-THIONE)

4,4'-BI(DIBENZOFURAN)

4,4'-BIS-PHENYLETHYNYL-BIPHENYL

4,4'-BIS(4-BROMOPHENYL)TETRATHIAFULVALENE

4,4''-BIS(TRIMETHYLSILYL)-P-TERPHENYL

4,4'-DIBROMOAZOXYBENZENE

4,4'-Dichlorochalcone

4,4'-DIIODO-3,3'-DIMETHOXYBIPHENYL

4,4'-DIMETHYL-BICYCLOHEXYL-3,6,3',6'-TETRAENE-2,5,2',5'-TETRAONE

4,4'-DINITRO-BIPHENYL-2,2'-DICARBOXYLIC ACID DIMETHYL ESTER

4,4'-METHYLENEBIS(N-(2-PYRIDYLOXYCARBONYL)ANILINE)

4,4'-METHYLENEBIS(N-(4-METHOXYBENZYLIDENE)ANILINE)

4,4'-METHYLENEBIS(PROPIOPHENONE)

4,4'-SULFONYLBIS(N-(4-ACETAMIDOBENZYLIDENE)ANILINE)

4,4'-TRIMETHYLENEBIS(1-PIPERIDINEDITHIOCARBOXYLIC ACID, AMMONIUM SALT)