[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-6′,7′,8′-trideoxy-2′-O-(2-methoxyethyl)-β-D-allo-octofuranoguanylyl-(3′→5′-8′)-6′,7′,8′-trideoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-5′-thio-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-6′,7′,8′-trideoxy-2′-O-(2-methoxyethyl)-β-D-allo-octofuranoguanylyl-(3′→5′-8′)-5′-amino-5′,6′,7′,8′-tetradeoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-6′,7′,8′-trideoxy-2′-O-methyl-β-D-allo-octofuranoguanylyl-(3′→5′-8′)-6′,7′,8′-trideoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-5′-thio-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-6′,7′,8′-trideoxy-2′-O-methyl-β-D-allo-octofuranoguanylyl-(3′→5′-8′)-5′-amino-5′,6′,7′,8′-tetradeoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-6′,7′,8′-trideoxy-5-methyl-2′-O-[2-(methylamino)-2-oxoethyl]-β-D-allo-octofuranouridylyl-(3′→5′-8′)-6′,7′,8′-trideoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-5′-thio-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-6′,7′,8′-trideoxy-5-methyl-2′-O-[2-(methylamino)-2-oxoethyl]-β-D-allo-octofuranouridylyl-(3′→5′-8′)-5′-amino-5′,6′,7′,8′-tetradeoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-6′,7′,8′-trideoxy-2′-O-(2-methoxyethyl)-5-methyl-β-D-allo-octofuranouridylyl-(3′→5′-8′)-6′,7′,8′-trideoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-5′-thio-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-6′,7′,8′-trideoxy-2′-O-(2-methoxyethyl)-5-methyl-β-D-allo-octofuranouridylyl-(3′→5′-8′)-5′-amino-5′,6′,7′,8′-tetradeoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-6′,7′,8′-trideoxy-5-methyl-2′-O-methyl-β-D-allo-octofuranouridylyl-(3′→5′-8′)-6′,7′,8′-trideoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-5′-thio-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-6′,7′,8′-trideoxy-5-methyl-2′-O-methyl-β-D-allo-octofuranouridylyl-(3′→5′-8′)-5′-amino-5′,6′,7′,8′-tetradeoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-6′,7′,8′-trideoxy-2′-O-[2-(methylamino)-2-oxoethyl]-β-D-allo-octofuranoadenylyl-(3′→5′-8′)-6′,7′,8′-trideoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-5′-thio-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-6′,7′,8′-trideoxy-2′-O-[2-(methylamino)-2-oxoethyl]-β-D-allo-octofuranoadenylyl-(3′→5′-8′)-5′-amino-5′,6′,7′,8′-tetradeoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-6′,7′,8′-trideoxy-2′-O-(2-methoxyethyl)-β-D-allo-octofuranoadenylyl-(3′→5′-8′)-6′,7′,8′-trideoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-5′-thio-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-6′,7′,8′-trideoxy-2′-O-(2-methoxyethyl)-β-D-allo-octofuranoadenylyl-(3′→5′-8′)-5′-amino-5′,6′,7′,8′-tetradeoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-6′,7′,8′-trideoxy-2′-O-methyl-β-D-allo-octofuranoadenylyl-(3′→5′-8′)-6′,7′,8′-trideoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-5′-thio-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-P(O)-(2-cyanoethyl)-P-deoxo-6′,7′,8′-trideoxy-2′-O-[2-(methylamino)-2-oxoethyl]-β-D-allo-octofuranocytidylyl-(3′→5′)-8′-bromo-6′,7′,8′-trideoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-5′-thio-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-P(O)-(2-cyanoethyl)-P-deoxo-6′,7′,8′-trideoxy-2′-O-[2-(methylamino)-2-oxoethyl]-β-D-allo-octofuranocytidylyl-(3′→5′)-5′-amino-8′-bromo-5′,6′,7′,8′-tetradeoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-P(O)-(2-cyanoethyl)-P-deoxo-6′,7′,8′-trideoxy-2′-O-(2-methoxyethyl)-β-D-allo-octofuranocytidylyl-(3′→5′)-8′-bromo-6′,7′,8′-trideoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-5′-thio-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-P(O)-(2-cyanoethyl)-P-deoxo-6′,7′,8′-trideoxy-2′-O-(2-methoxyethyl)-β-D-allo-octofuranocytidylyl-(3′→5′)-5′-amino-8′-bromo-5′,6′,7′,8′-tetradeoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-P(O)-(2-cyanoethyl)-P-deoxo-6′,7′,8′-trideoxy-2′-O-methyl-β-D-allo-octofuranocytidylyl-(3′→5′)-8′-bromo-6′,7′,8′-trideoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-5′-thio-β-D-ribo-octofuranothymidine