Sigma-Aldrich
4,4'-BIS-(2-NITRO-PHENOXY)-BIPHENYL
4,4'-BIS(3-(3-PYRIDYL)UREIDO)DIPHENYLMETHANE
4,4'-BIS(4-ETHOXYPHENYLAZO)-3,3'-DISULFOSTILBENE DISODIUM SALT
4,4'-diamino[1,1'-biphenyl]-2,2'-disulfonic acid
4,4'-DICHLORO-2',5'-DIMETHOXYBUTYRANILIDE
4,4'-DIFLUORO-2,2'-DINITROBIBENZYL
4,4′-Dimethoxy-2′-hydroxychalcone
4,4'-DIMETHYLENEBIS(ETHYL BENZOATE)
4,4'-DITHIOBIS((1-BETA-D-RIBOFURANOSYL-2(1H)-PYRIMIDINONE))
4,4'-METHYLENEBIS(N-(3,4-(METHYLENEDIOXY)BENZYLIDENE)ANILINE)
4,4'-METHYLENEBIS(N-(N-(2-BENZOTHIAZOLYL)CARBAMOYL)ANILINE)
4,4'-STILBENEDICARBONYL CHLORIDE
4,4'-TETRAMETHYLENEBIS(ACETOPHENONE)
4,4',4''-METHANETRIYLTRIS(2,6-DI-TERT-BUTYLPHENOL)
4,4-DICHLORO-1,1-DIMETHYL-3-BUTEN-1-YL ACETATE