6-N-acetyl-2',3',5'-tris-O-(tert-butyldimethylsilyl)adenosine

6-N-acetyl-2',3',5'-tris-O-(tert-butyldimethylsilyl)-6-N-methyladenosine

6-氯嘌呤

1,2,3,5-四-O-乙酰基-β-D-呋喃核糖

9-阿拉伯呋喃糖基-6-叠氮基嘌呤