N-[1-[2-Deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-4,5-dihydro-7-iodo-4-oxo-1H-imidazo[4,5-c]pyridin-6-yl]acetamide

N-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-4-[[(diphenylamino)carbonyl]oxy]-7-[2-(1-naphthalenyl)ethynyl]-1H-imidazo[4,5-c]pyridin-6-yl]acetamide

N-[1-(2-Deoxy-β-D-erythro-pentofuranosyl)-4-[[(diphenylamino)carbonyl]oxy]-7-[2-(1-naphthalenyl)ethynyl]-1H-imidazo[4,5-c]pyridin-6-yl]acetamide

N-[7-Bromo-1-[2-deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-4,5-dihydro-4-oxo-1H-imidazo[4,5-c]pyridin-6-yl]acetamide

N-[1-[2-Deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-4,5-dihydro-4-oxo-1H-imidazo[4,5-c]pyridin-6-yl]acetamide

6-Amino-1-(2-deoxy-β-D-erythro-pentofuranosyl)-1,5-dihydro-7-[2-(1-naphthalenyl)ethynyl]-4H-imidazo[4,5-c]pyridin-4-one

Methyl (1R,3R,4R,7S)-1-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-7-[[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]oxy]-3-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)(-κ-oxo)-2-oxa-5-azabicyclo[2.2.1]heptane-5-undecanoate

Methyl (1R,3R,4R,7S)-1-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-3-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-7-hydroxy(-κ-oxo)-2-oxa-5-azabicyclo[2.2.1]heptane-5-undecanoate

Methyl (1R,3R,4R,7S)-1-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-7-[[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]oxy]-3-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-ο-oxo-2-oxa-5-azabicyclo[2.2.1]heptane-5-hexadecanoate