Guanosine, 2′-deoxy-6-O-[2-[[1-[2-deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]amino]ethyl]-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(triphenylmethyl)-

Guanosine, 2′-deoxy-6-O-[2-[[1-[2-deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]amino]ethyl]-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-N-[(4-methoxyphenyl)diphenylmethyl]-

Cytidine, N,N′′-1,2-ethanediylbis[2′-deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-

Cytidine, 2′-deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(2-hydroxyethyl)-

Uridine, 2′-deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-4-O-(2-hydroxyethyl)-

1-[2-Deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-4-(3-nitro-1H-1,2,4-triazol-1-yl)-2(1H)-pyrimidinone

9-[2-Deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-6-(3-nitro-1H-1,2,4-triazol-1-yl)-9H-purin-2-amine

9-[2-Deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-6-(3-nitro-1H-1,2,4-triazol-1-yl)-N-(triphenylmethyl)-9H-purin-2-amine

9-[2-Deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-N-[(4-methoxyphenyl)diphenylmethyl]-6-(3-nitro-1H-1,2,4-triazol-1-yl)-9H-purin-2-amine

Guanosine, 2′-deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(triphenylmethyl)-

Guanosine, N-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-

Uridine, 3′-O-(tetrahydro-4-methoxy-2H-pyran-4-yl)uridylyl-(2′→5′)-

Adenosine, 3′-O-(tetrahydro-4-methoxy-2H-pyran-4-yl)adenylyl-(2′→5′)-

Uridine, 3′-O-(tetrahydro-4-methoxy-2H-pyran-4-yl)-

Adenosine, 3′-O-(tetrahydro-4-methoxy-2H-pyran-4-yl)-

Adenosine, 2′-O-(tetrahydro-4-methoxy-2H-pyran-4-yl)adenylyl-(3′→5′)-

Cytidine, 2′-O-(tetrahydro-4-methoxy-2H-pyran-4-yl)-

Benzo[b]thien-2-ylphosphonomethyl hydrogen 5′-cytidylate

(S)-2-Benzoxazolylphosphonomethyl hydrogen 5′-cytidylate

(R)-2-Benzoxazolylphosphonomethyl hydrogen 5′-cytidylate