S-[[(2R,3S,5R)-5-(3,4-Dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-2-[2-[[(1,1-dimethylethyl)diphenylsilyl]oxy]ethyl]tetrahydro-3-furanyl]methyl] ethanethioate

S-[[(2R,3S,5R)-2-[2-[Bis(4-methoxyphenyl)phenylmethoxy]ethyl]-5-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)tetrahydro-3-furanyl]methyl] ethanethioate

N-[9-[3-[(Acetylthio)methyl]-3,5-dideoxy-6-O-[(1,1-dimethylethyl)diphenylsilyl]-2-O-(1H-imidazol-1-ylthioxomethyl)-β-D-ribo-hexofuranosyl]-6,9-dihydro-6-oxo-1H-purin-2-yl]-2-methylpropanamide

N-[9-[3-[(Acetylthio)methyl]-3,5-dideoxy-6-O-[(1,1-dimethylethyl)diphenylsilyl]-2-O-(1H-imidazol-1-ylthioxomethyl)-β-D-ribo-hexofuranosyl]-9H-purin-6-yl]benzamide

N-[1-[3-[(Acetylthio)methyl]-3,5-dideoxy-6-O-[(1,1-dimethylethyl)diphenylsilyl]-2-O-(1H-imidazol-1-ylthioxomethyl)-β-D-ribo-hexofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]benzamide

1-[3-[(Acetylthio)methyl]-3,5-dideoxy-6-O-[(1,1-dimethylethyl)diphenylsilyl]-2-O-(1H-imidazol-1-ylthioxomethyl)-β-D-ribo-hexofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[3-[(Acetylthio)methyl]-6-O-[bis(4-methoxyphenyl)phenylmethyl]-3,5-dideoxy-2-O-(1H-imidazol-1-ylthioxomethyl)-β-D-ribo-hexofuranosyl]-2,4(1H,3H)-pyrimidinedione

N-[9-[3-[(Acetylthio)methyl]-3,5-dideoxy-6-O-[(1,1-dimethylethyl)diphenylsilyl]-β-D-ribo-hexofuranosyl]-6,9-dihydro-6-oxo-1H-purin-2-yl]-2-methylpropanamide

N-[1-[3-[(Acetylthio)methyl]-3,5-dideoxy-6-O-[(1,1-dimethylethyl)diphenylsilyl]-β-D-ribo-hexofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]benzamide

1-[3-[(Acetylthio)methyl]-3,5-dideoxy-6-O-[(1,1-dimethylethyl)diphenylsilyl]-β-D-ribo-hexofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[3-[(Acetylthio)methyl]-6-O-[bis(4-methoxyphenyl)phenylmethyl]-3,5-dideoxy-β-D-ribo-hexofuranosyl]-2,4(1H,3H)-pyrimidinedione

N-[9-[3,5-Dideoxy-6-O-[(1,1-dimethylethyl)diphenylsilyl]-3-(hydroxymethyl)-β-D-ribo-hexofuranosyl]-6,9-dihydro-6-oxo-1H-purin-2-yl]-2-methylpropanamide

N-[1-[3,5-Dideoxy-6-O-[(1,1-dimethylethyl)diphenylsilyl]-3-(hydroxymethyl)-β-D-ribo-hexofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]benzamide

1-[3,5-Dideoxy-6-O-[(1,1-dimethylethyl)diphenylsilyl]-3-(hydroxymethyl)-β-D-ribo-hexofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[6-O-[Bis(4-methoxyphenyl)phenylmethyl]-3,5-dideoxy-3-(hydroxymethyl)-β-D-ribo-hexofuranosyl]-2,4(1H,3H)-pyrimidinedione

Thymidine, 5′-O-[(1,1-dimethylethyl)dimethylsilyl]-3-O-[(3S)-3,4-dihydro-3-methyl-1-sulfido-1H-imidazo[1,2-c][1,3,2]oxazaphosphorin-1-yl]-

Thymidine, 5′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-[bis[(1S)-2-(1H-imidazol-2-yl)-1-methylethyl] phosphite]

Thymidine, 5′-O-[(1,1-dimethylethyl)dimethylsilyl]-3-O-[(3S)-3,4-dihydro-3-methyl-1H-imidazo[1,2-c][1,3,2]oxazaphosphorin-1-yl]-

Thymidine, 5′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-[bis(2,6-dichlorophenyl) phosphite]

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-, 3′-(di-1H-imidazol-1-ylphosphinite)