2-甲酰基-3-氧代丙酸乙酯

4-甲脒基吡啶水合盐酸盐

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

乙氧基甲叉丙二酸二乙酯

6-氧代-2-(吡啶-4-基)-1,6-二氢嘧啶-5-羧酸乙酯