4-DIMETHYLAMINO-O-TOLUALDEHYDE

4-DIMETHYLAMINO-3,5-DINITROBENZOIC ACID

4-DIMETHYLAMINONAPHTHALENE-1-CARBOXYLIC ACID

4-(DI-N-PROPYLAMINO)BUTYRONITRILE

4-ETHOXYPHENYLACETIC ACID

4-ETHYLPHENYL ISOTHIOCYANATE

ethylmorpholinium bromide

4-ETHYLPHENYLACETONITRILE