6-ethyl-1,3-dimethylpyrimidine-2,4-dione

6-甲氨基-1,3-二甲基脲嘧啶

6-丁基氨基-1,3-二甲基尿嘧啶

6-甲氧基-1,3-二甲基脲嘧啶

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