4,4'-(2-OXO-2,3-DIHYDROOXAZOLE-4,5-DIYL)DIBENZENE-1-SULFONYL CHLORIDE

4,4'-(4-METHYL-1,3-PHENYLENE)BIS(1-PHENYLSEMICARBAZIDE)

4,4'-(hydroxymethylene)dibenzoic acid

4,4'-(propane-2,2-diyl)bis(3-methylisoxazol-5(4H)-one)

4,4''-BIS-BROMOMETHYL-(1,1',3',1'')TERPHENYL-2'-CARBOXYLIC ACID

4,4'-BIS(2,6-DIPHENYL-1-METHYLPYRIDINIUM TETRAFLUOROBORATE)

4,4'-BIS(4-METHOXYPHENYL)-5,5'-DIMETHYLTETRATHIAFULVALENE

4,4'-BIS(N-(2-HYDROXY-1-NAPHTHYLMETHYLENE)AMINO)DIPHENYL SULFONE

4,4'-Butylidenebis(6-tert-butyl-m-cresol)

4,4'-DICARBOXYAZOXYBENZENE

4,4'-DIHYDRAZINO-2,2'-BIPHENYLDISULFONIC ACID

4,4'-DIMETHYLSTILBENE

4,4'-DITHIOBIS(N-(2-HYDROXY-1-NAPHTHYLMETHYLENE)ANILINE)

4,4'-METHYLENEBIS(1-CYCLOHEXYL-1-ISOPROPYL-3-PHENYLUREA)

4-NITROFLUORESCEIN