(2013/04/24)
ethyl 1-ethyl-5-hydroxy-6-((4-methoxybenzyl)oxy)-4-oxo-1,4-dihydroquinolin-3-carboxylate
ethyl 1-ethyl-5,6-dihydroxy-4-oxo-1,4-dihydroquinolin-3-carboxylate
ethyl 1-ethyl-5,6-dimethoxy-4-oxo-1,4-dihydroquinolin-3-carboxylate
5,6-dimethoxy-1H-benzo[d][1,3]oxazine-2,4-dione
1-ethyl-5,6-dimethoxy-1H-benzo[d][1,3]oxazine-2,4-dione