N,9-二乙酰鸟嘌呤

trimethylsilyl N-(7-(trimethylsilyl)-6-((trimethylsilyl)oxy)-7H-purin-2-yl)acetimidate

7,9-二氢-9-beta-D-呋喃核糖基-1H-嘌呤-2,6,8(3H)-三酮

N2-acetyl-9-(2',3',5'-tri-O-benzoyl-β-D-ribofuranosyl)guanine

6-methoxy-2-((methoxycarbonyl)amino)-9-β-D-ribofuranosylpurine