2',3'-O-bis(tert-butyldimethylsilyl)-5'-O-(sulfamoyl)adenosine

2',3',5'-tri-O-acetyl-8-phenyladenosine

2',3'-O-(methoxymethylidene)adenosine

N6-acetyl-N6-isopentenyl-2',3',5'-tri-O-acetyladenosine

2'-t-butyldimethylsilyl-5'-O-di-t-butylphosphoryl-3'-deoxyadenosine