Synonyms: 3,7-quinolinedicarboxylic acid, 1,4-dihydro-4-oxo-, 3-ethyl 7-methyl ester;3,7-quinolinedicarboxylic acid, 4-hydroxy-, 3-ethyl 7-methyl ester;3-Ethyl 7-methyl 4-hydroxyquinoline-3,7-dicarboxylate;3-Ethyl 7-methyl 4-oxo-1,4-dihydroquinoline-3,7-dicarboxylate