Uridine, 2′-deoxy-5-fluoro-P-thiouridylyl-(3′→5′)-2′-deoxy-5-fluoro-P-thiouridylyl-(3′→5′)-2′-deoxy-5-fluoro-P-thiouridylyl-(3′→5′)-2′-deoxy-5-fluoro-P-thiouridylyl-(3′→5′)-2′-deoxy-5-fluoro-P-thiouridylyl-(3′→5′)-2′-deoxy-5-fluoro-P-thiouridylyl-(3′→5′)-2′-deoxy-5-fluoro-

Uridine, 2′-deoxy-5-fluoro-P-thiouridylyl-(3′→5′)-2′-deoxy-5-fluoro-P-thiouridylyl-(3′→5′)-2′-deoxy-5-fluoro-P-thiouridylyl-(3′→5′)-2′-deoxy-5-fluoro-P-thiouridylyl-(3′→5′)-2′-deoxy-5-fluoro-P-thiouridylyl-(3′→5′)-2′-deoxy-5-fluoro-

Uridine, 2′-deoxy-5-fluoro-P-thiouridylyl-(3′→5′)-2′-deoxy-5-fluoro-P-thiouridylyl-(3′→5′)-2′-deoxy-5-fluoro-P-thiouridylyl-(3′→5′)-2′-deoxy-5-fluoro-P-thiouridylyl-(3′→5′)-2′-deoxy-5-fluoro-

Uridine, 2′-deoxy-5-fluoro-P-thiouridylyl-(3′→5′)-2′-deoxy-5-fluoro-P-thiouridylyl-(3′→5′)-2′-deoxy-5-fluoro-P-thiouridylyl-(3′→5′)-2′-deoxy-5-fluoro-

Adenosine, [P(R)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-deoxo-P(O)-[(1S)-2-(methylamino)-1-phenylethyl]thymidylyl-(3′→5′)-N-benzoyl-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Thymidine, [P(R)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-deoxo-2′-deoxy-P(O)-[(1S)-2-(methylamino)-1-phenylethyl]-N-(phenylacetyl)guanylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

[P(R)]-N-Benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-deoxo-2′-deoxy-P(O)-[(1S)-2-(methylamino)-2-phenylethyl]cytidylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)dimethylsilyl]thymidine

[P(R)]-N-Benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-deoxo-2′-deoxy-P(O)-[(1S)-2-(methylamino)-1-phenylethyl]adenylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)dimethylsilyl]thymidine

Thymidine, [P(R)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-deoxo-P(O)-[(1S)-2-(methylamino)-2-phenylethyl]thymidylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Guanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(2S,5S)-3-methyl-5-phenyl-1,3,2-oxazaphospholidin-2-yl]-N-(phenylacetyl)-

N-Benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(2S,5S)-3-methyl-5-phenyl-1,3,2-oxazaphospholidin-2-yl]cytidine

N-Benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(2S,5S)-3-methyl-5-phenyl-1,3,2-oxazaphospholidin-2-yl]adenosine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-3′-O-[(2S,5S)-3-methyl-5-phenyl-1,3,2-oxazaphospholidin-2-yl]thymidine

Thymidine, [P(R)]-P-deoxo-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-P(O)-[(1R,2S)-2-(methylamino)-1,2-diphenylethyl]thymidylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Thymidine, [P(S)]-P-deoxo-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-P(O)-[(1R,2S)-2-(methylamino)-1,2-diphenylethyl]thymidylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Thymidine, [P(R)]-P-deoxo-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-P(O)-[(1R,2S)-2-(methylamino)-1-phenylpropyl]thymidylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Thymidine, [P(S)]-P-deoxo-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-P(O)-[(1R,2S)-2-(methylamino)-1-phenylpropyl]thymidylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

[P(S)]-P-Deoxo-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-P(O)-[(1R)-2-(methylamino)-1-phenylethyl]thymidylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)dimethylsilyl]thymidine

[P(S)]-P-Deoxo-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-P(O)-[(1S)-2-(methylamino)-1-phenylethyl]thymidylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)dimethylsilyl]thymidine

Thymidine, [P(R)]-P-deoxo-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-P(O)-[(1S)-2-(methylamino)-1-phenylethyl]thymidylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-