4,4'(5')-DI-T-BUTYLDICYCLO-HEXANO-18-CROWN-6

1,1,1-Tris(4-hydroxyphenyl)ethane

4,4,4-TRIFLUORO-1-(2-FURYL)-1,3-BUTANEDIONE

4,4',4''-TRIMETHYLTRITYL ALCOHOL

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