Cytidine, [P(S)]-N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-P-thioadenylyl-(3′→5′)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(4-methoxybenzoyl)-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Cytidine, [P(R)]-N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-P-thioadenylyl-(3′→5′)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(4-methoxybenzoyl)-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Cytidine, [P(S)]-N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-P-thioadenylyl-(3′→5′)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(4-methoxybenzoyl)-, 3′-(4-oxopentanoate)

Cytidine, [P(R)]-N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-P-thioadenylyl-(3′→5′)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(4-methoxybenzoyl)-, 3′-(4-oxopentanoate)

Cytidine, [P(S)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-P-thiouridylyl-(3′→5′)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(4-methoxybenzoyl)-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Cytidine, [P(R)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-P-thiouridylyl-(3′→5′)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(4-methoxybenzoyl)-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Cytidine, [P(S)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-P-thiouridylyl-(3′→5′)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(4-methoxybenzoyl)-, 3′-(4-oxopentanoate)

Cytidine, [P(R)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-P-thiouridylyl-(3′→5′)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(4-methoxybenzoyl)-, 3′-(4-oxopentanoate)

Adenosine, [P(S)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-N-benzoyl-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Adenosine, [P(R)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-N-benzoyl-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Adenosine, [P(S)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-N-benzoyl-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-(4-oxopentanoate)

Adenosine, [P(R)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-N-benzoyl-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-(4-oxopentanoate)

Guanosine, [P(S)]-N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-P-thioadenylyl-(3′→5′)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(2-methyl-1-oxopropyl)-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Guanosine, [P(R)]-N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-P-thioadenylyl-(3′→5′)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(2-methyl-1-oxopropyl)-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Guanosine, [P(S)]-N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-P-thioadenylyl-(3′→5′)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(2-methyl-1-oxopropyl)-, 3′-(4-oxopentanoate)

Guanosine, [P(R)]-N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-P-thioadenylyl-(3′→5′)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(2-methyl-1-oxopropyl)-, 3′-(4-oxopentanoate)

Uridine, [P(S)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-P-thiouridylyl-(3′→5′)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Uridine, [P(R)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-P-thiouridylyl-(3′→5′)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Uridine, [P(S)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-P-thiouridylyl-(3′→5′)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-(4-oxopentanoate)

Uridine, [P(R)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-P-thiouridylyl-(3′→5′)-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-(4-oxopentanoate)