2,4-嘧啶二甲腈

2-(二甲基氨基)-4-嘧啶甲腈

4-(4,6-dichloropyrimidin-2-yl)-N,N-dimethylpyrimidin-2-amine

6-chloro-2-(2-methoxypyrimidin-4-yl)-7H-purine

4-chloro-2-(2-methoxypyrimidin-4-yl)pteridine