3,4-dihydro-3-oxo-2-quinoxalineacetic acid,ethyl ester

diethyl 2-(diethylamino)but-2-enedioate

5-chloro-7-iodo-4-oxo-1,4-dihydroquinoline-2-carboxylic acid

7-chloro-5-iodo-4-oxo-1H-quinoline-2-carboxylic acid

4-甲氧基苯甲腈