2,6-diamino-8,2'-anhydro-8-hydroxy-9-β-D-arabinofuranosylpurine

2,6-diacetamido-8,2'-anhydro-8-hydroxy-9-(3,5-O-diacetyl-β-D-arabinofuranosyl)purine

2,6-diacetamido-8-mercapto-9-(3,5-O-diacetyl-β-D-arabinofuranosyl)purine

N22',3',5'-O-tetraacetyl-9-β-D-arabinofuranosylguanine

2,6-diamino-9-(2,3,5-tri-O-benzyl-β-D-arabinofuranosyl)purine