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

1-((2R,4S,5R)-4-Hydroxy-5-hydroxymethyl-tetrahydro-furan-2-yl)-4-{2-[9-((2R,4S,5R)-4-hydroxy-5-hydroxymethyl-tetrahydro-furan-2-yl)-2-(trityl-amino)-9H-purin-6-yloxy]-ethylamino}-1H-pyrimidin-2-one

1-[(2R,4S,5R)-4-(tert-Butyl-dimethyl-silanyloxy)-5-(tert-butyl-dimethyl-silanyloxymethyl)-tetrahydro-furan-2-yl]-4-(2-hydroxy-ethylamino)-1H-pyrimidin-2-one

4-(3-nitro-1,2,4-triazolo)-1-[β-D-3,5-O-bis(tert-butyldimethylsilyl)-2-deoxyribofuranosyl]pyrimidin-2(1H)-one

9-[(2R,4S,5R)-4-(tert-Butyl-dimethyl-silanyloxy)-5-(tert-butyl-dimethyl-silanyloxymethyl)-tetrahydro-furan-2-yl]-2-(trityl-amino)-9H-purin-6-ol