β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-6′-deoxy-2′-O-(2-methoxyethyl)-β-D-allofuranocytidylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-6′-deoxy-2′-O-methyl-β-D-allofuranocytidylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-2′-deoxy-2′-fluorocytidylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-2′-O-[2-(methylamino)-2-oxoethyl]cytidylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-2′-O-(2-methoxyethyl)cytidylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-2′-O-methylcytidylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-2′,6′-dideoxy-2′-fluoro-β-D-altrofuranocytidylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-2′,6′-dideoxy-2′-fluoro-α-L-galactofuranocytidylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-2′-deoxy-2′-fluoro-β-D-arabino-cytidylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-2′,6′-dideoxy-2′-fluoro-α-L-talofuranoguanylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-6′-deoxy-2′-O-[2-(methylamino)-2-oxoethyl]-α-L-talofuranoguanylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-6′-deoxy-2′-O-(2-methoxyethyl)-α-L-talofuranoguanylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-6′-deoxy-2′-O-methyl-α-L-talofuranoguanylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-2′,6′-dideoxy-2′-fluoro-β-D-allofuranoguanylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-6′-deoxy-2′-O-[2-(methylamino)-2-oxoethyl]-β-D-allofuranoguanylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-2′-deoxy-2′-fluoroguanylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-2′-O-[2-(methylamino)-2-oxoethyl]guanylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-6′-deoxy-2′-O-(2-methoxyethyl)-β-D-allofuranoguanylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-6′-deoxy-2′-O-methyl-β-D-allofuranoguanylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)

β-D-ribo-Heptofuranothymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-2′-O-(2-methoxyethyl)guanylyl-(3′→5′)-6′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 7′-(4-methylbenzenesulfonate)