乙基2-甲基-4-氧代-1H-喹啉-3-羧酸酯

diethyl 3,5-bis(2-ethoxy-2-oxoethyl)-1H-pyrrole-2,4-dicarboxylate

diethyl 2-hexanoylpropanedioate

3-氧代月桂酸乙酯

2-[2-(5-nitrofuran-2-yl)ethenyl]-4-oxo-1H-quinoline-3-carboxylic acid