2′-Deoxy-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-N-[2-[4-(1,1-dimethylethyl)phenoxy]acetyl]-3′-O-[(methyldithio)methyl]-5-[3-[(2,2,2-trifluoroacetyl)amino]-1-propyn-1-yl]cytidine

2′-Deoxy-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-3′-O-[(methyldithio)methyl]-N-[2-[4-(1-methylethyl)phenoxy]acetyl]-5-[3-[(2,2,2-trifluoroacetyl)amino]-1-propyn-1-yl]cytidine

2′-Deoxy-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-3′-O-[(methyldithio)methyl]-N-(2-phenoxyacetyl)-5-[3-[(2,2,2-trifluoroacetyl)amino]-1-propyn-1-yl]cytidine

2′-Deoxy-N-[(dimethylamino)methylene]-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-3′-O-[(methyldithio)methyl]-5-[3-[(2,2,2-trifluoroacetyl)amino]-1-propyn-1-yl]cytidine

N-Benzoyl-2′-deoxy-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-3′-O-[(methyldithio)methyl]-5-[3-[(2,2,2-trifluoroacetyl)amino]-1-propyn-1-yl]cytidine

2′-Deoxy-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-N-[2-[4-(1,1-dimethylethyl)phenoxy]acetyl]-5-[3-[(2,2,2-trifluoroacetyl)amino]-1-propyn-1-yl]-3′-O-[[[(2,4,6-trimethoxyphenyl)methyl]thio]methyl]cytidine

2′-Deoxy-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-N-[2-[4-(1-methylethyl)phenoxy]acetyl]-5-[3-[(2,2,2-trifluoroacetyl)amino]-1-propyn-1-yl]-3′-O-[[[(2,4,6-trimethoxyphenyl)methyl]thio]methyl]cytidine

2′-Deoxy-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-N-(2-phenoxyacetyl)-5-[3-[(2,2,2-trifluoroacetyl)amino]-1-propyn-1-yl]-3′-O-[[[(2,4,6-trimethoxyphenyl)methyl]thio]methyl]cytidine

2′-Deoxy-N-[(dimethylamino)methylene]-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-5-[3-[(2,2,2-trifluoroacetyl)amino]-1-propyn-1-yl]-3′-O-[[[(2,4,6-trimethoxyphenyl)methyl]thio]methyl]cytidine

N-Benzoyl-2′-deoxy-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-5-[3-[(2,2,2-trifluoroacetyl)amino]-1-propyn-1-yl]-3′-O-[[[(2,4,6-trimethoxyphenyl)methyl]thio]methyl]cytidine

2′-Deoxy-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-5-[3-[(2,2,2-trifluoroacetyl)amino]-1-propyn-1-yl]-3′-O-[[[(2,4,6-trimethoxyphenyl)methyl]thio]methyl]uridine

3H-Indolium, 3-[22-[2-amino-7-[2-deoxy-3-O-[(ethylthio)methyl]-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl]-9,9-dimethyl-6,18-dioxo-13,16-dioxa-10,11-dithia-7,19-diazadocos-21-yn-1-yl]-2-[5-[1,3-dihydro-3..

3H-Indolium, 3-[22-[2-amino-7-[2-deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-3-O-[(methylthio)methyl]-β-D-erythro-pentofuranosyl]-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl]-9,9-dimethyl-6,18-dioxo-13,16-dioxa-10,11-dithia-7,19-diazadocos-21-yn-1-yl]-2-[5-[1,3-dihydro-..

2-Amino-5-(3-amino-1-propyn-1-yl)-7-[2-deoxy-3-O-[(ethylthio)methyl]-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-3,7-dihydro-4H-pyrrolo[2,3-d]pyrimidin-4-one

2-Amino-5-(3-amino-1-propyn-1-yl)-7-[2-deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-3-O-[(methylthio)methyl]-β-D-erythro-pentofuranosyl]-3,7-dihydro-4H-pyrrolo[2,3-d]pyrimidin-4-one

N-[3-[7-[2-Deoxy-5-O-[(1,1-dimethylethyl)diphenylsilyl]-3-O-[(methylthio)methyl]-β-D-erythro-pentofuranosyl]-2-[[2-[4-(1,1-dimethylethyl)phenoxy]acetyl]amino]-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl]-2-propyn-1-yl]-2,2,2-trifluoroacetamide

N-[3-[7-[2-Deoxy-5-O-[(1,1-dimethylethyl)diphenylsilyl]-3-O-[(methylthio)methyl]-β-D-erythro-pentofuranosyl]-4,7-dihydro-2-[[2-[4-(1-methylethyl)phenoxy]acetyl]amino]-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl]-2-propyn-1-yl]-2,2,2-trifluoroacetamide

N-[3-[7-[2-Deoxy-5-O-[(1,1-dimethylethyl)diphenylsilyl]-3-O-[(methylthio)methyl]-β-D-erythro-pentofuranosyl]-4,7-dihydro-4-oxo-2-[(2-phenoxyacetyl)amino]-3H-pyrrolo[2,3-d]pyrimidin-5-yl]-2-propyn-1-yl]-2,2,2-trifluoroacetamide

N-[7-[2-Deoxy-5-O-[(1,1-dimethylethyl)diphenylsilyl]-3-O-[(methylthio)methyl]-β-D-erythro-pentofuranosyl]-4,7-dihydro-4-oxo-5-[3-[(2,2,2-trifluoroacetyl)amino]-1-propyn-1-yl]-3H-pyrrolo[2,3-d]pyrimidin-2-yl]benzamide

N-[3-[7-[2-Deoxy-5-O-[(1,1-dimethylethyl)diphenylsilyl]-β-D-erythro-pentofuranosyl]-2-[[2-[4-(1,1-dimethylethyl)phenoxy]acetyl]amino]-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl]-2-propyn-1-yl]-2,2,2-trifluoroacetamide