4', 4'''-Azobis(N-(9, 10-dihydro-9, 10-dioxo-2-anthryl)(1, 1'-biphenyl)-4-carboxamide)

4', 4'''-Bi-O-acetoacetanisidide

4', 4'''-Bi-o-acetotoluidide, 2, 2''-bis(diethylamino)-, dihydrochloride

4', 4'''-Biacetanilide, 2'-methyl-

4', 4'''-Biacetanilide, 2, 2''-bis(diethylamino)-, dihydrochloride

4', 4'''-Biacetanilide, 3', 3'''-dimethoxy-

4', 4'''-Bis(1-piperidineacetanilide), dihydrochloride

4', 4'''-Bis(1-piperidineaceto-o-toluidide), dihydrochloride

4', 4'''-Dimethylcuppressuflavanone

4', 4'', 4'''-Tribenzoyl-1, 3, 5-triphenylbenzene

4', 4''-Bis(imidazolin-2-yl)isophthalanilide

4', 4''-Bis(imidazolin-2-yl)isophthalanilide dihydrochloride

4', 4''-Di-2-imidazolin-2-ylterephthalanilide

4', 4''-Dimethylepigallocatechin gallate

4', 4', 6', 6'-Tetrakis(1-aziridinyl)-1, 3, 4', 4', 6', 6'-hexahydrospiro(2H-1, 3, 2-benzodiazaphosphole-2, 2'-lambda(5)(1, 3, 5, 2, 4, 6)triazatriphosphorine)

4', 4'-Diacetamido stilbene-2, 2'-disulfonic acid

4', 4'-Dichloromercuric-2, 2, 2', 2'-bistilbene tetrasulfonic acid

4', 5''-Dideoxy-5''-guanidinbutirosin A

4', 5'-Bis(1, 3, 2-dithioarsolan-2-yl)fluorescein

4', 5'-Dibromo-3', 6'-dihydroxy-2', 7'-dimethylspiro(isobenzofuran-1(3H), 9'-(9H)xanthene)-3-one