3-Quinolinecarboxylic acid, 1,2-dihydro-4-hydroxy-1-methyl-2-oxo-, ethyl ester
Ethyl 4-hydroxy-1-methylcarbostyril-3-carboxylate
Ethyl 4-hydroxy-1-methyl-2-oxo-1,2-dihydroquinoline-3-carboxylate
Ethyl 1,2-dihydro-4-hydroxy-1-methyl-2-oxoquinoline-3-carboxylate
1,2-Dihydro-4-hydroxy-1-methyl-2-oxo-3-quinolinecarboxylic acid ethyl ester