1,3,7,9-tetramethyl-1H,9H-pyrido[2,3-d,6,5-d']dipyrimidine-2,4,6,8-tetraone

1,3-二甲基-6-亚氨基-5-异亚硝基尿嘧啶

6-Dimethylamino-1,3-dimethyl-1H-pyrimidin-2,4-dion

5-acetyl-6-amino-1,3-dimethylpyrimidine-2,4-dione

1,3-二甲基-2,4-二氧代-1,2,3,4-四氢吡啶并[2,3-d]嘧啶-6-羧酸甲酯