2-氨基-4-甲基嘧啶

5-溴-4-氯-6-甲基-2-嘧啶胺

4-氧代-2-嘧啶基-N,N-二甲基-

2-氨基-5-碘-6-甲基-4-羟基嘧啶

6-methyl-2-[(6-methyl-4-oxo-1H-pyrimidin-2-yl)amino]-1H-pyrimidin-4-one