ethyl 5-methoxy-7-methylimidazo[1,2-a]pyrimidine-2-carboxylate

2-氨基-4,6-二甲基嘧啶

5-bromo-4-chloro-2-(2,5-dimethylpyrrol-1-yl)-6-methylpyrimidine

2-氨基-4-甲基嘧啶

5-溴-4-氯-6-甲基-2-嘧啶胺