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

8-苯基茶碱

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

6-amino-5-(benzylideneamino)-1,3-dimethylpyrimidine-2,4-dione

6-(4-methoxyphenyl)-1,3-dimethylpteridine-2,4-dione