1,3,7-trimethylpteridine-2,4-dione

N-(4-amino-1,3-dimethyl-2,6-dioxopyrimidin-5-yl)-4-(trifluoromethyl)benzamide

6-amino-5-[(4-chlorophenyl)methylideneamino]-1,3-dimethylpyrimidine-2,4-dione

8-苄基茶碱

1,3-dimethyl-2,4-dioxopteridine-6-carbonitrile