1,4-Dihydro-1-methyl-4-oxoquinoline 1-Methyl-4(1H)-quinolinone 1-Methyl-4(1H)-quinolone 1-Methyl-4-quinolone 4(1H)-QUINOLONE, 1-METHYL- 5-21-08-00210 (Beilstein Handbook Reference) 83-54-5 BRN 0122247 EINECS 201-485-3 Echinopsine N-Methyl-4-quinolone N-Methyl-gamma-quinoline