2-Morpholinoethyl isocyanide

4-(2-PYRIDYL)-2-METHYL-3-BUTYN-2-OL

4-(2-PYRIDYLAZO)-N,N-DIMETHYLANILINE

4-(2-PYRIDYLAZO)-N,N-DIMETHYLANILINE

4-Pyridineethanesulfonic acid

4-(2-THIENYL)BENZOIC ACID

4-(3,4-DIHYDRO-2H-1,5-BENZODIOXEPIN-7-YL)-4-OXOBUTANOIC ACID

4-(3,5-DICHLOROPHENYL)-6-(METHYLTHIO)-1,3,5-TRIAZIN-2-AMINE

4-(3-FLUOROPHENYL)-3-THIOSEMICARBAZIDE

4-(3-FLUOROPHENYL)SEMICARBAZIDE

4-(3-HYDROXY-3-METHYLBUT-1-YNYL)BENZALDEHYDE OXIME

4-(4-BROMO-2-CHLOROANILINO)-4-OXOBUT-2-ENOIC ACID