N-[4,5-Dihydro-1-(2-O-methyl-β-D-ribofuranosyl)-4-oxo-1H-imidazo[4,5-c]pyridin-6-yl]formamide

6-Amino-1-(2-O-methyl-β-D-ribofuranosyl)-1H-imidazo[4,5-c]pyridin-4-yl N,N-diphenylcarbamate

6-[(Aminomethylene)amino]-1-(2-O-methyl-β-D-ribofuranosyl)-1H-imidazo[4,5-c]pyridin-4-yl N,N-diphenylcarbamate

6-(Formylamino)-1-(2-O-methyl-β-D-ribofuranosyl)-1H-imidazo[4,5-c]pyridin-4-yl N,N-diphenylcarbamate

N′-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-O-methyl-β-D-ribofuranosyl]-4-[[(diphenylamino)carbonyl]oxy]-1H-imidazo[4,5-c]pyridin-6-yl]-N,N-dimethylmethanimidamide

N′-[4-[[(Diphenylamino)carbonyl]oxy]-1-(2-O-methyl-β-D-ribofuranosyl)-1H-imidazo[4,5-c]pyridin-6-yl]-N,N-dimethylmethanimidamide

N′-[4-[[(Diphenylamino)carbonyl]oxy]-1-[2-O-methyl-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-ribofuranosyl]-1H-imidazo[4,5-c]pyridin-6-yl]-N,N-dimethylmethanimidamide

N′-[4-[[(Diphenylamino)carbonyl]oxy]-1-[3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-ribofuranosyl]-1H-imidazo[4,5-c]pyridin-6-yl]-N,N-dimethylmethanimidamide

N′-[4,5-Dihydro-4-oxo-1-[3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-ribofuranosyl]-1H-imidazo[4,5-c]pyridin-6-yl]-N,N-dimethylmethanimidamide

3′-Thymidylic acid, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-6-[3-[3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-5-methyl-2-oxo-1,3-diazabicyclo[2.2.0]hex-5-en-6-yl]-5,6-dihydro-5-hydroxy-, mono(2-cyanoethyl) ester, intramol. 3′,5′′′-ester, (5R,6S)-

3′-Thymidylic acid, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-6-[3-(2-deoxy-β-D-erythro-pentofuranosyl)-5-methyl-2-oxo-1,3-diazabicyclo[2.2.0]hex-5-en-6-yl]-5,6-dihydro-5-hydroxy-, mono(2-cyanoethyl) ester, intramol. 3′,5′′′-ester, [P(S),5R,6S]-

3′-Thymidylic acid, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-6-[3-(2-deoxy-β-D-erythro-pentofuranosyl)-5-methyl-2-oxo-1,3-diazabicyclo[2.2.0]hex-5-en-6-yl]-5,6-dihydro-5-hydroxy-, mono(2-cyanoethyl) ester, intramol. 3′,5′′′-ester, [P(R),5R,6S]-

3′-Thymidylic acid, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-6-[3-[2-deoxy-3-O-(1,4-dioxopentyl)-β-D-erythro-pentofuranosyl]-5-methyl-2-oxo-1,3-diazabicyclo[2.2.0]hex-5-en-6-yl]-5,6-dihydro-5-hydroxy-, mono(2-cyanoethyl) ester, intramol. 3′,5′′′-ester, [P(R),5R,6S]-

3′-Thymidylic acid, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-6-[3-[2-deoxy-3-O-(1,4-dioxopentyl)-β-D-erythro-pentofuranosyl]-5-methyl-2-oxo-1,3-diazabicyclo[2.2.0]hex-5-en-6-yl]-5,6-dihydro-5-hydroxy-, mono(2-cyanoethyl) ester, intramol. 3′,5′′′-ester, [P(S),5R,6S]-

3′-Thymidylic acid, 6-[3-[2-deoxy-3-O-(1,4-dioxopentyl)-β-D-erythro-pentofuranosyl]-5-methyl-2-oxo-1,3-diazabicyclo[2.2.0]hex-5-en-6-yl]-5,6-dihydro-5-hydroxy-, mono(2-cyanoethyl) ester, intramol. 3′,5′′′-ester, [P(S),5R,6S]-

3′-Thymidylic acid, 6-[3-[2-deoxy-3-O-(1,4-dioxopentyl)-β-D-erythro-pentofuranosyl]-5-methyl-2-oxo-1,3-diazabicyclo[2.2.0]hex-5-en-6-yl]-5,6-dihydro-5-hydroxy-, mono(2-cyanoethyl) ester, intramol. 3′,5′′′-ester, [P(R),5R,6S]-

N-[[6-(Aminomethyl)-2-pyridinyl]methyl]-1-deoxy-1-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)-β-D-ribofuranuronamide

N-[[3-(Aminomethyl)phenyl]methyl]-1-deoxy-1-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)-β-D-ribofuranuronamide

5′-Deoxy-5′-[[[6-(aminomethyl)-2-pyridinyl]methyl]amino]uridine

5′-Deoxy-5′-[[[3-(aminomethyl)phenyl]methyl]amino]uridine