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

4-Amino-1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2,6-dideoxy-2-fluoro-β-D-altrofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2,6-dideoxy-2-fluoro-α-L-galactofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2,6-dideoxy-2-fluoro-β-D-allofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2,6-dideoxy-2-fluoro-α-L-talofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-6-deoxy-2-O-[2-(methylamino)-2-oxoethyl]-β-D-allofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-6-deoxy-2-O-[2-(methylamino)-2-oxoethyl]-α-L-talofuranosyl]-2(1H)-pyrimidinone

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-[2-(methylamino)-2-oxoethyl]-, 3′-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite]

4-Amino-1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-6-deoxy-2-O-(2-methoxyethyl)-β-D-allofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-6-deoxy-2-O-(2-methoxyethyl)-α-L-talofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2,6-dideoxy-β-D-ribo-hexofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2,6-dideoxy-α-L-lyxo-hexofuranosyl]-2(1H)-pyrimidinone