6-丁基氨基-1,3-二甲基尿嘧啶

6-(benzylamino)-1,3-dimethylpyrimidine-2,4-dione

6-(4-methoxyanilino)-1,3-dimethylpyrimidine-2,4-dione

1,3,7-trimethylpyrido[2,3-d]pyrimidine-2,4-dione

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