Cytidine, 5′-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]cytidylyl-(2′→5′)-

Cytidine, 5′-O-[hydroxy(phosphonooxy)phosphinyl]cytidylyl-(2′→5′)-

Uridine, 5′-O-[hydroxy(phosphonooxy)phosphinyl]uridylyl-(2′→5′)-uridylyl-(2′→5′)-uridylyl-(2′→5′)-uridylyl-(2′→5′)-

Uridine, 5′-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]uridylyl-(2′→5′)-uridylyl-(2′→5′)-uridylyl-(2′→5′)-

Uridine, 5′-O-[hydroxy(phosphonooxy)phosphinyl]uridylyl-(2′→5′)-uridylyl-(2′→5′)-uridylyl-(2′→5′)-

Uridine, 5′-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]uridylyl-(2′→5′)-

Uridine, 2′-deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-1′-C-(hydroxymethyl)-

2,4(1H,3H)-Pyrimidinedione, 1-[3-chloro-3-deoxy-4,6-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-fructofuranosyl]-

2,4(1H,3H)-Pyrimidinedione, 1-[1-O-acetyl-3-O-benzoyl-4,6-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-fructofuranosyl]-

2,4(1H,3H)-Pyrimidinedione, 1-[1-O-acetyl-3-deoxy-4,6-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-3-(methoxycarbonyl)-β-D-fructofuranosyl]-

1-[3,5-Di-O-acetyl-2-[(acetyloxy)methyl]-2-deoxy-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-[3,5-Di-O-acetyl-2-[(acetyloxy)methyl]-2-deoxy-α-D-ribofuranosyl]-2,4(1H,3H)-pyrimidinedione

Spiro[[1,3]azasilolo[1,2-c]pyrimidine-3(2H),2′(3′H)-furan]-5,7(1H,6H)-dione, 4′-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-5′-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-4′,5′-dihydro-1,1-dimethyl-, (2′S,4′S,5′R)-

Spiro[[1,3]azasilolo[1,2-c]pyrimidine-3(2H),2′(3′H)-furan]-5,7(1H,6H)-dione, 3′-chloro-4′-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-5′-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-4′,5′-dihydro-1,1-dimethyl-, (2′R,3′S,4′R,5′R)-

Uridine, 5′-O-[hydroxy(phosphonooxy)phosphinyl]uridylyl-(2′→5′)-

Spiro[[1,3]azasilolo[1,2-c]pyrimidine-3(2H),2′(3′H)-furan]-5,7(1H,6H)-dione, 3′-(benzoyloxy)-4′-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-5′-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-4′,5′-dihydro-1,1-dimethyl-, (2′S,3′S,4′R,5′R)-

Methyl (2′S,3′S,4′S,5′R)-4′-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-5′-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-1,4′,5,5′,6,7-hexahydro-1,1-dimethyl-5,7-dioxospiro[[1,3]azasilolo[1,2-c]pyrimidine-3(2H),2′(3′H)-furan]-3′-carboxylate

Spiro[[1,3]azasilolo[1,2-c]pyrimidine-3(2H),2′(3′H)-furan]-5,7(1H,6H)-dione, 4′-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-5′-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-4′,5′-dihydro-1,1-dimethyl-3′-methylene-, (4′S,5′R)-

(2R,3S,3aR,10aS)-3-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]-2-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-2,3,3a,10a-tetrahydro-3a,5,5-trimethyl-4H-furo[3,2-e]pyrimido[1,6-a][1,3]azasiline-7,9(5H,8H)-dione

Spiro[[1,3]azasilolo[1,2-c]pyrimidine-3(2H),2′(3′H)-furan]-5,7(1H,6H)-dione, 4′-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-5′-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-4′,5′-dihydro-1,1,3′-trimethyl-, (2′S,3′S,4′S,5′R)-