6-氨基-2,4-二氧代-1,2,3,4-四氢嘧啶-5-甲醛

二甲胺

4-氨基-2,6-二氯嘧啶

7-methyl-1H-pyrido[2,3-d]pyrimidine-2,4-dione

N-trimethylsilyl-2,6-bis(trimethylsilyloxy)pyrimidin-4-amine