ethyl 3-ethoxyquinoxaline-2-carboxylate

ethyl 4-ethyl-3-oxo-3,4-dihydroquinoxaline-2-carboxylate

1-乙基-2(1H)-喹喔啉酮

3-氨基-1H-吡唑啉酮[3,4-b]喹喔啉