((5-甲基-2-吡啶氨基)亚甲基)丙二酸二乙酯

ethyl 4-chloro-2-pyridin-4-ylpyrimidine-5-carboxylate

2-((4-氯苯基氨基)亚甲基)缩苹果酸二乙基酯

7-溴-4-氧代-1,4-二氢喹啉-3-羧酸乙酯

Ethyl 4-chloro-2-(2-thienyl)-5-pyrimidinecarboxylate