1,4-Dihydro-6,7-dimethoxy-4-oxo-3-quinolinecarboxylic acid,ethyl ester;ethyl 6,7-dimethoxy-4-oxo-1,4-dihydro-3-quinolinecarboxylate;ethyl 4-hydroxy-6,7-dimethoxyquinoline-3-carboxylate;6,7-dimethoxy-3-ethoxycarbonyl-4(1H)-quinolone;6,7-DIMETHOXY-4-OXO-1,4-DIHYDRO-QUINOLINE-3-CARBOXYLIC ACID ETHYL ESTER;
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