4,4'-DIMETHYLBENZOIN

4,4'-DISULFANEDIYLDIBENZONITRILE

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

4-NITROPHENYL 4-(ETHOXYCARBONYLMETHOXY)-1-HYDROXY-2-NAPHTHOATE

4-NITROPHENYL-BETA-D-THIOGALACTOPYRANOSIDE

4,4'-METHYLENEBIS(S-BUTYL N-PHENYLTHIOLCARBAMATE)

4,4'-SULFONYLBIS(N-(4-BENZYLOXYBENZYLIDENE)ANILINE)

4,4-BIS(3,5-DIBROMO-4-HYDROXYPHENYL)VALERIC ACID

4-oxo-4-(10H-phenothiazin-2-yl)butanoic acid

4-OXO-4H-3,2,1-BENZOXATHIAPLUMBIN

4,4-DIPHENYL-CYCLOHEXA-2,5-DIENONE

4,4,4-TRIFLUORO-2-(5-(3-NITRO-PH)-FURAN-2-YLMETHYLENE)-1-PHENYL-BUTANE-1,3-DIONE

4,4,7,7-TETRANITROSEBACOYL CHLORIDE

4,5-BIS-(PYRIDIN-2-YLSULFANYL)-PHTHALONITRILE

4,5-Di-O-caffeoylquinic acid methyl ester