4,4'-[1,5-PENTANEDIYLBIS(OXY)] BISBENZOIC ACID

4,4'-BIPHENYLDISULFONIC ACID

4,4Iminobis(1-methyl)pyridiniumdiiodide

4,4Iminobis(1-methyl)pyridiniumdiiodide

4,4'-BIPHENYLDICARBONYL CHLORIDE

4,4'-BIS(3-CARBOXY-4-CHLOROPHENYL-AMINO)TRITYL CHLORIDE

4,4'-DIHYDROXYDIPHENYLMETHANE