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

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

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

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

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

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(S)]-P-deoxo-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)dimethylsilyl]-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-P-deoxo-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)dimethylsilyl]-5′-thio-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(S)]-P-deoxo-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)dimethylsilyl]-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-P-deoxo-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)dimethylsilyl]-5′-thio-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(S)]-P-deoxo-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)dimethylsilyl]-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-P-deoxo-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)dimethylsilyl]-5′-thio-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(S)]-P-deoxo-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)dimethylsilyl]-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(R)]-P-deoxo-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)dimethylsilyl]-5′-thio-β-D-ribo-octofuranothymidine

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(S)]-P-deoxo-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)dimethylsilyl]-β-D-ribo-octofuranothymidine

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

[P(R)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-8′)-[P(S)]-P-deoxo-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)dimethylsilyl]-β-D-ribo-octofuranothymidine

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

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

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

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