[P(S)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-7′)-6′-deoxy-2′-O-(2-methoxyethyl)-3′-O-(phenylmethyl)-β-D-allo-heptofuranoguanosine

[P(S)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-7′)-6′-deoxy-2′-O-methyl-3′-O-(phenylmethyl)-β-D-allo-heptofuranoguanosine

[P(S)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-7′)-6′-deoxy-5-methyl-2′-O-[2-(methylamino)-2-oxoethyl]-3′-O-(phenylmethyl)-β-D-allo-heptofuranouridine

[P(S)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-7′)-6′-deoxy-2′-O-(2-methoxyethyl)-5-methyl-3′-O-(phenylmethyl)-β-D-allo-heptofuranouridine

[P(S)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-7′)-6′-deoxy-5-methyl-2′-O-methyl-3′-O-(phenylmethyl)-β-D-allo-heptofuranouridine

[P(S)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-7′)-6′-deoxy-2′-O-[2-(methylamino)-2-oxoethyl]-3′-O-(phenylmethyl)-β-D-allo-heptofuranoadenosine

[P(S)]-5′-O-[Bis(4-methoxyphenyl)phenylmethyl]thymidylyl-(3′→5′-7′)-6′-deoxy-2′-O-(2-methoxyethyl)-3′-O-(phenylmethyl)-β-D-allo-heptofuranoadenosine

β-D-allo-Heptofuranocytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxothymidylyl-(3′→5′)-6′-deoxy-2′-O-[2-(methylamino)-2-oxoethyl]-3′-O-(phenylmethyl)-, 7′-(4-methylbenzenesulfonate)

β-D-allo-Heptofuranocytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxothymidylyl-(3′→5′)-6′-deoxy-2′-O-(2-methoxyethyl)-3′-O-(phenylmethyl)-, 7′-(4-methylbenzenesulfonate)

β-D-allo-Heptofuranocytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxothymidylyl-(3′→5′)-6′-deoxy-2′-O-methyl-3′-O-(phenylmethyl)-, 7′-(4-methylbenzenesulfonate)

β-D-allo-Heptofuranoguanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxothymidylyl-(3′→5′)-6′-deoxy-2′-O-[2-(methylamino)-2-oxoethyl]-3′-O-(phenylmethyl)-, 7′-(4-methylbenzenesulfonate)

β-D-allo-Heptofuranoguanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxothymidylyl-(3′→5′)-6′-deoxy-2′-O-(2-methoxyethyl)-3′-O-(phenylmethyl)-, 7′-(4-methylbenzenesulfonate)

β-D-allo-Heptofuranoguanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxothymidylyl-(3′→5′)-6′-deoxy-2′-O-methyl-3′-O-(phenylmethyl)-, 7′-(4-methylbenzenesulfonate)

β-D-allo-Heptofuranouridine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxothymidylyl-(3′→5′)-6′-deoxy-5-methyl-2′-O-[2-(methylamino)-2-oxoethyl]-3′-O-(phenylmethyl)-, 7′-(4-methylbenzenesulfonate)

β-D-allo-Heptofuranouridine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxothymidylyl-(3′→5′)-6′-deoxy-2′-O-(2-methoxyethyl)-5-methyl-3′-O-(phenylmethyl)-, 7′-(4-methylbenzenesulfonate)

β-D-allo-Heptofuranouridine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxothymidylyl-(3′→5′)-6′-deoxy-5-methyl-2′-O-methyl-3′-O-(phenylmethyl)-, 7′-(4-methylbenzenesulfonate)

β-D-allo-Heptofuranoadenosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxothymidylyl-(3′→5′)-6′-deoxy-2′-O-[2-(methylamino)-2-oxoethyl]-3′-O-(phenylmethyl)-, 7′-(4-methylbenzenesulfonate)

β-D-allo-Heptofuranoadenosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxothymidylyl-(3′→5′)-6′-deoxy-2′-O-(2-methoxyethyl)-3′-O-(phenylmethyl)-, 7′-(4-methylbenzenesulfonate)

4-Amino-1-[6-deoxy-2-O-[2-(methylamino)-2-oxoethyl]-7-O-[(4-methylphenyl)sulfonyl]-3-O-(phenylmethyl)-β-D-allo-heptofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[6-deoxy-2-O-(2-methoxyethyl)-7-O-[(4-methylphenyl)sulfonyl]-3-O-(phenylmethyl)-β-D-allo-heptofuranosyl]-2(1H)-pyrimidinone