5'-azido-N6-benzoyl-3'-(tert-butyloxycarbonylamino)-2'-O-(tert-butyldimethylsilyl)-3',5'-dideoxyadenosine

9-(2-O-(tert-butyldimethylsilyl)-3-deoxy-3-methylene-β-D-erythro-pentofuranosyl)adenine

6-amino-9-(3-deoxy-3-C-allyl-2-O-tert-butyldimethylsilyl-β-D-pentofuranosyl)-N6-trityl-9H-purine

3'-amino-N6-benzoyl-2'-O-(tert-butyldimethylsilyl)-5'-(4-monomethoxytritylamino)-3',5'-dideoxyadenosine

3'-deuterioadenosine