7-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)pyrazolo<4,3-e>tetrazolo<1,5-c>pyrimidine

[3,4-二乙酰氧基-5-(5-甲硫基-2,4,8,9-四氮杂双环[4.3.0]壬-2,4,7,10-四烯-9-基)四氢呋喃-2-基]甲基乙酸酯

1 beta-呋喃核糖基-4-(甲硫基)吡唑并(3,4-d)嘧啶

2-(hydroxymethyl)-5-[4-(methylamino)pyrazolo[3,4-d]pyrimidin-1-yl]oxolane-3,4-diol

2-[4-(dimethylamino)pyrazolo[3,4-d]pyrimidin-1-yl]-5-(hydroxymethyl)oxolane-3,4-diol