5,6-二氨基-1,3-二甲基尿苷水合物

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

茶碱

4,6-dimethyl-[1,2,5]oxadiazolo[3,4-d]pyrimidine-5,7-dione

1,3,7,9-tetramethyl-5-oxy-1H,9H-pyrimido[5,4-g]pteridine-2,4,6,8-tetraone