Thymidine, 3′-azido-3′-deoxy-5′-O-[4-(mercaptomethyl)-2-sulfido-1,3,2-oxathiaphospholan-2-yl]-

Uridine, 5′-O-[4-(mercaptomethyl)-2-sulfido-1,3,2-oxathiaphospholan-2-yl]-

Adenosine, 5′-O-[4-(mercaptomethyl)-2-oxido-1,3,2-oxathiaphospholan-2-yl]-

Thymidine, 3′-azido-3′-deoxy-5′-O-[4-(mercaptomethyl)-2-oxido-1,3,2-oxathiaphospholan-2-yl]-

Uridine, 5′-O-[4-(mercaptomethyl)-2-oxido-1,3,2-oxathiaphospholan-2-yl]-

Guanosine, guanylyl-(3′→5′)-guanylyl-(3′→5′)-guanylyl-(3′→5′)-adenylyl-(3′→5′)-uridylyl-(3′→5′)-

5′-Adenylic acid, 2′-deoxy-, dibutyl ester

Uridine, 2′-deoxy-3′,5′-di-O-ethyl-5-fluoro-3-(4-propoxybenzoyl)-

3-(3,5-Di-O-acetyl-2-deoxy-β-D-erythro-pentofuranosyl)-8-(methylthio)-3H-imidazo[4,5-g]quinazoline

3-[2-Deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-3H-imidazo[4,5-g]quinazolin-8-amine

3-[2-Deoxy-5-O-[hydroxy(phosphonooxy)phosphinyl]-β-D-erythro-pentofuranosyl]-3H-imidazo[4,5-g]quinazolin-8-amine

3-(2-Deoxy-5-O-phosphono-β-D-erythro-pentofuranosyl)-3H-imidazo[4,5-g]quinazolin-8-amine

3-(2,5-Di-O-acetyl-β-D-ribofuranosyl)-8-(methylthio)-3H-imidazo[4,5-g]quinazoline

3-(3,5-Di-O-acetyl-β-D-ribofuranosyl)-8-(methylthio)-3H-imidazo[4,5-g]quinazoline

Cytidine, N,N-bis[(1,1-dimethylethoxy)carbonyl]-

2′-Deoxy-N,N-bis[(1,1-dimethylethoxy)carbonyl]adenosine

Adenosine, N,N-bis[(1,1-dimethylethoxy)carbonyl]-

Guanosine, 2′-deoxy-N,N-bis[(1,1-dimethylethoxy)carbonyl]-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-, 6-(1,1-dimethylethyl carbonate)

Guanosine, N,N-bis[(1,1-dimethylethoxy)carbonyl]-2′,3′,5′-tris-O-[(1,1-dimethylethyl)dimethylsilyl]-, 6-(1,1-dimethylethyl carbonate)

Guanosine, N,N-bis[(1,1-dimethylethoxy)carbonyl]-, 2′,3′,5′-triacetate 6-(1,1-dimethylethyl carbonate)