4-(CHLOROACETYL)-2,3,5,6-TETRACHLOROPYRIDINE

4-(Chloromethyl)-7-methyl-2H-chromen-2-one

4-(CYCLOPENTYLAMINO)-2-(METHYLSULFANYL)-5-PYRIMIDINECARBALDEHYDE

4-(diethylamino)-1-phenyl-1-butanone hydrochloride

4-(4-NITRO-PHENYL)-2,6-DIPHENYL-PYRANYLIUM, PERCHLORATE

4-(4-nitrophenyl)-1,3-dihydro-2H-imidazole-2-thione

4-(4-PHENYL-5-(TRIFLUOROMETHYL)-1H-PYRAZOL-3-YL)-1,3-BENZENEDIOL

4-(DIMETHYLAMINO)BENZOIC (2-CHLOROBENZYLIDENE)HYDRAZIDE

4-(DIPHENYL-PHOSPHINOYL)-2-HYDROXY-1,2-DIPHENYL-BUTAN-1-ONE

4-(ETHOXYCARBONYL)PHENYL N-(4-CHLORO-3-NITROPHENYL)CARBAMATE

4-(ETHOXYOXALYL-AMINO)-BENZOIC ACID ETHYL ESTER

4-(Ethylsulfonyl)piperidine hydrochloride

4-(HEXADECYLOXY)-3-NITROPHENYL METHYL SULFONE

4-(HEXADECYLTHIO)BENZENESULFONIC ACID

4-(Hydroxymethyl)-1-isopropylpyrrolidin-2-one