5-(6-Amino-hex-1-ynyl)-1-[(2R,4S,5R)-4-(tert-butyl-dimethyl-silanyloxy)-5-(tert-butyl-dimethyl-silanyloxymethyl)-tetrahydro-furan-2-yl]-1H-pyrimidine-2,4-dione

3',5'-bis-(dimethyl-tert-butylsilyl)-5-(3-(2-(dimethylamino)ethoxy)-3-methylbutyn-1-yl)-2'-deoxyuridine

6-[1-((2R,4S,5R)-4-Hydroxy-5-hydroxymethyl-tetrahydro-furan-2-yl)-2,4-dioxo-1,2,3,4-tetrahydro-pyrimidin-5-yl]-hex-5-ynoic acid 4,5-dimethoxy-2-nitro-benzyl ester

5-[1-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-5-hexyn-6-yl]-2'-deoxy-5'-O-(4,4'-dimethoxytrityl)uridine

3',5'-bis-tert-butyldimethylsilyl-5-[3-(N-methylphenylamino)propanoyl]-2'-deoxyuridine