ethyl 3-(2-nitroanilino)-3-oxopropanoate

(5-溴-3-硝基吡啶-2-基)丙二酸二乙酯

ethyl 2-chloro-6-nitroquinoline-3-carboxylate

diethyl 2-(1H-pyrrol-2-ylmethylidene)propanedioate

2-疏基-4,6-二羟基-嘧啶