1,3-二甲基脲嘧啶

1,3-dimethyl-5-phenylsulfanylpyrimidine-2,4-dione

5-溴-1,3-二甲基尿嘧啶

3,6-dimethyl-1,3-oxazine-2,4-dione

2,4-二甲氧基-6-甲基嘧啶