(2R,2'R,3S,3'S,5R,5'R)-5,5'-((((5-(3,4-dichlorophenyl)-2,3-dihydro-1H-pyrrolizine-6,7-diyl)bis(methylene))bis(azanediyl))bis(6-(4-nitrophenethoxy)-9H-purine-2,9-diyl))bis(2-(hydroxymethyl)tetrahydrofuran-3-ol)

3',5'-bis-O-(tert-butyldimethylsilyl)-O2-(4-methylbenzenesulfonyl)-2'-deoxyxanthosine

(2R,3S,5R)-5-(6-(benzyloxy)-2-((9-((2R,4S,5R)-4-hydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-9H-purin-6-yl)amino)-9H-purin-9-yl)-2-(hydroxymethyl)tetrahydrofuran-3-ol

6-N-(2-(5'-O-3'-O-bis(tert-butyldimethylsilyl)-6-O-benzyl-2'-deoxyinosyl))-5'-O-3'-O-bis(tert-butyldimethylsilyl)-2'-deoxyadenosine

3′,5′-O-bis(tert-butyldimethylsilyl)-O6-(p-nitrophenylethyl)-2′-deoxy-2-fluoroguanosine