1-ethyl-1

Brn 0489054

2-dihydro-4-hydroxy-2-oxo-

ethyl 1-ethyl-4-hydroxy-2-oxo-1,2-dihydroquinoline-3-carboxylate

1-Ethyl-4-hydroxy-2-oxo-1,2-dihydroquinoline-3-carboxylic acid ethyl ester

3-Quinolinecarboxylic acid, 1,2-dihydro-1-ethyl-4-hydroxy-2-oxo-, ethyl ester