Thymidine, 5′-O-[(1,1-dimethylethyl)dimethylsilyl]-P-2-propenyl-2′-O-2-propenyluridylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Thymidine, 5′-O-[(1,1-dimethylethyl)dimethylsilyl]-2′-C-(1Z)-1-propenyl-P-(2-propenyl)-β-D-arabino-uridylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Thymidine, 2′-deoxy-5′-O-[(1,1-dimethylethyl)dimethylsilyl]-2′-methylene-P-2-propenyluridylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

1-[5-O-[(1,1-Dimethylethyl)dimethylsilyl]-2-C-(1Z)-1-propen-1-yl-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-[5-O-[(1,1-Dimethylethyl)dimethylsilyl]-2-C-1-propyn-1-yl-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-(2-C-1-Propyn-1-yl-β-D-arabinofuranosyl)-2,4(1H,3H)-pyrimidinedione

1-[2-C-1-Propyn-1-yl-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

Uridine, 2′-deoxy-5′-O-[(1,1-dimethylethyl)dimethylsilyl]-2′-methylene-

2′-Deoxy-5-[3-[(17-oxoestra-1,3,5(10)-trien-3-yl)oxy]-1-propyn-1-yl]uridine

2′-Deoxy-5-[3-[4-(triphenylmethyl)phenoxy]-1-propyn-1-yl]uridine

5-[3-(4-Benzoylphenoxy)-1-propyn-1-yl]-2'-deoxyuridine

Furo[2,3-d]pyrimidin-2(3H)-one, 6-[[(17-oxoestra-1,3,5(10)-trien-3-yl)oxy]methyl]-3-[tetrahydro-3-hydroxy-5-(hydroxymethyl)-2-furanyl]-

3-(2-Deoxy-β-D-erythro-pentofuranosyl)-6-[[4-(triphenylmethyl)phenoxy]methyl]furo[2,3-d]pyrimidin-2(3H)-one

Uridine, 2′-deoxy-5-[3-(3-perylenylmethoxy)-1-propynyl]-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-

Uridine, 2′-deoxy-5-[3-[(17-oxoestra-1,3,5(10)-trien-3-yl)oxy]-1-propynyl]-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-

Uridine, 2′-deoxy-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-5-[3-[4-(triphenylmethyl)phenoxy]-1-propynyl]-

Uridine, 5-[3-(4-benzoylphenoxy)-1-propynyl]-2′-deoxy-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-

Ethyl (3S,5R)-2-(2,3:5,6-di-O-cyclohexylidene-α-D-mannofuranosyl)-5-[(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)methyl]-3-isoxazolidinecarboxylate

1-[[(3S,5S)-2-(2,3:5,6-Di-O-cyclohexylidene-α-D-mannofuranosyl)-3-(hydroxymethyl)-5-isoxazolidinyl]methyl]-5-fluoro-2,4(1H,3H)-pyrimidinedione

1-[[(3S,5S)-2-(2,3:5,6-Di-O-cyclohexylidene-α-D-mannofuranosyl)-3-(hydroxymethyl)-5-isoxazolidinyl]methyl]-5-methyl-2,4(1H,3H)-pyrimidinedione