1-[2-Deoxy-5-O-(4-hydroxybenzoyl)-3-O-[(5-hydroxy-1H-indol-3-yl)carbonyl]-α-D-threo-pentofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-[2-Deoxy-5-O-(4-hydroxybenzoyl)-3-O-[(5-hydroxy-1H-indol-3-yl)carbonyl]-α-D-threo-pentofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

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