Adenosine, 5′-O-[6-amino-9-[5-O-(6-amino-9-β-D-ribofuranosyl-9H-purin-2-yl)-β-D-ribofuranosyl]-9H-purin-2-yl]-2-propoxy-

Xanthosine, 2-O-butyl-

Adenosine, 2-chloro-2′,3′-O-(ethoxymethylene)-

Adenosine, 2-butoxy-2′,3′-O-(ethoxymethylene)-

1-(2-Amino-2-deoxy-D-galactofuranosyl)-5-methyl-2,4(1H,3H)-pyrimidinedione

Uridine, 2′-O-(tetrahydro-2H-pyran-2-yl)uridylyl-(3′→5′)-, 5′-ester with uridine

5-Methoxy-2-β-D-ribofuranosyl-3(2H)-pyridazinone

5-Amino-4-chloro-2-[2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-3(2H)-pyridazinone

5-Amino-2-β-D-ribofuranosyl-3(2H)-pyridazinone

5-Amino-4-chloro-2-β-D-ribofuranosyl-3(2H)-pyridazinone

4,5-Dichloro-2-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)-3(2H)-pyridazinone

5,7-Dichloro-3-β-D-ribofuranosyl-3H-imidazo[4,5-b]pyridine

7-Chloro-3-β-D-ribofuranosyl-3H-imidazo[4,5-b]pyridin-5-amine

7-(Phenylmethoxy)-N-(phenylmethyl)-3-β-D-ribofuranosyl-3H-imidazo[4,5-b]pyridin-5-amine

N-(7-Chloro-3-β-D-ribofuranosyl-3H-imidazo[4,5-b]pyridin-5-yl)acetamide

N-[7-Chloro-3-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)-3H-imidazo[4,5-b]pyridin-5-yl]acetamide

Cytidine 5′-(trihydrogen diphosphate), 2′-O-(1-methoxyethyl)-

Guanosine, N-benzoyl-5′-O-[hydroxy(2,2,2-trichloroethoxy)phosphinyl]-2′-O-(tetrahydro-2H-pyran-2-yl)-P-(2,2,2-trichloroethyl)guanylyl-(3′→5′)-N-benzoyl-2′,3′-bis-O-(tetrahydro-2H-pyran-2-yl)-

Adenosine, N-benzoyl-5′-O-[hydroxy(2,2,2-trichloroethoxy)phosphinyl]-2′-O-(tetrahydro-2H-pyran-2-yl)-P-(2,2,2-trichloroethyl)adenylyl-(3′→5′)-2′-O-(tetrahydro-2H-pyran-2-yl)-P-(2,2,2-trichloroethyl)uridylyl-(3′→5′)-N-benzoyl-2′,3′-bis-O-(tetrahydro-2H-pyran-2-yl)-

6-(2-Deoxy-β-D-erythro-pentofuranosyl)-2,6-dihydro-2-hydroxy-3-(2-oxoheptyl)imidazo[1,2-c]pyrimidin-5(3H)-one