(2-Methyl-2-cyclopropen-1-yl)methyl N-[3-[6,7-dihydro-6-[5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-ribofuranosyl]-7-thioxothieno[2,3-c]pyridin-4-yl]-2-propyn-1-yl]carbamate

(2-Methyl-2-cyclopropen-1-yl)methyl N-[3-(6,7-dihydro-6-β-D-ribofuranosyl-7-thioxothieno[2,3-c]pyridin-4-yl)-2-propyn-1-yl]carbamate

[2-Methyl-3-(trimethylsilyl)-2-cyclopropen-1-yl]methyl N-[3-(6,7-dihydro-6-β-D-ribofuranosyl-7-thioxothieno[2,3-c]pyridin-4-yl)-2-propyn-1-yl]carbamate

1-[4-C-Azido-5-O-(3-chlorobenzoyl)-2,3-dideoxy-2-fluoro-β-L-erythro-pentofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-[(2S,3S,5R)-5-Azido-3-fluorotetrahydro-5-(iodomethyl)-2-furanyl]-2,4(1H,3H)-pyrimidinedione

1-[(2S,3S,5R)-3-Fluorotetrahydro-5-(iodomethyl)-2-furanyl]-2,4(1H,3H)-pyrimidinedione

1-[4-C-Azido-5-O-(3-chlorobenzoyl)-2,3-dideoxy-2-fluoro-2-methyl-β-L-erythro-pentofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-[(2S,3S,5R)-5-Azido-3-fluorotetrahydro-5-(iodomethyl)-3-methyl-2-furanyl]-2,4(1H,3H)-pyrimidinedione

1-[(2S,3S,5R)-3-Fluorotetrahydro-5-(iodomethyl)-3-methyl-2-furanyl]-2,4(1H,3H)-pyrimidinedione

1-[4-C-Azido-2-O-benzoyl-5-O-(3-chlorobenzoyl)-3-deoxy-2-C-methyl-β-L-erythro-pentofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-(4-C-Azido-3,5-dideoxy-5-iodo-2-C-methyl-β-L-erythro-pentofuranosyl)-2,4(1H,3H)-pyrimidinedione

1-(4-C-Azido-2-O-benzoyl-3,5-dideoxy-5-iodo-2-C-methyl-β-L-erythro-pentofuranosyl)-2,4(1H,3H)-pyrimidinedione

1-(3,5-Dideoxy-5-iodo-2-C-methyl-β-L-erythro-pentofuranosyl)-2,4(1H,3H)-pyrimidinedione

1-[4-C-Azido-2-O-benzoyl-5-O-(3-chlorobenzoyl)-3-deoxy-β-L-erythro-pentofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-(4-C-Azido-2-O-benzoyl-3,5-dideoxy-5-iodo-β-L-erythro-pentofuranosyl)-2,4(1H,3H)-pyrimidinedione

1-(4-C-Azido-3,5-dideoxy-5-iodo-β-L-erythro-pentofuranosyl)-2,4(1H,3H)-pyrimidinedione

1-(3,5-Dideoxy-5-iodo-β-L-erythro-pentofuranosyl)-2,4(1H,3H)-pyrimidinedione

1-[4-C-Azido-3-O-benzoyl-5-O-(3-chlorobenzoyl)-2-deoxy-2-fluoro-β-L-ribofuranosyl]-2,4(1H,3H)-pyrimidinedione