5-(4-DIMETHYLAMINOBENZYLIDENE)RHODANINE

4-(DI-N-PROPYLAMINO)BUTYRONITRILE

4-ETHOXYCARBONYLOXY-3,5-DIMETHOXYBENZOIC ACID

4-ETHOXYPHENYLBORONIC ACID

4-ETHYL-4-HYDROXY-3,4,12,14-TETRAHYDRO-1H-PYRANO[3'4':6,7]INDOLIZINO[1,2-B]QUINOLINE-3,14-DIONE