Ethyl 1-(2-deoxy-β-D-erythro-pentofuranosyl)-α,α-difluoro-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidineacetate

Ethyl α,α-difluoro-1,2,3,4-tetrahydro-1-[2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-2,4-dioxo-5-pyrimidineacetate

Guanosine, (S)-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxy-P-methyl-N-(2-methyl-1-oxopropyl)cytidylyl-(3′→5′)-2′-deoxy-N-(2-methyl-1-oxopropyl)-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Guanosine, (S)-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxy-P-methyl-N-(2-methyl-1-oxopropyl)cytidylyl-(3′→5′)-2′-deoxy-N-(2-methyl-1-oxopropyl)-

Guanosine, (S)-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxy-P-methyl-N-(2-methyl-1-oxopropyl)cytidylyl-(3′→5′)-2′-deoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-N-(2-methyl-1-oxopropyl)-

Thymidine, [P(S)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxy-P-methyl-N-(2-methyl-1-oxopropyl)cytidylyl-(3′→5′)-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Thymidine, [P(S)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxy-P-methyl-N-(2-methyl-1-oxopropyl)cytidylyl-(3′→5′)-

Thymidine, (S)-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxy-P-methyl-N-(2-methyl-1-oxopropyl)guanylyl-(3′→5′)-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Thymidine, [P(S)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxy-P-methyl-N-(2-methyl-1-oxopropyl)guanylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-

Cytidine, (S)-N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxy-P-methyladenylyl-(3′→5′)-2′-deoxy-N-(2-methyl-1-oxopropyl)-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Cytidine, (S)-N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxy-P-methyladenylyl-(3′→5′)-2′-deoxy-N-(2-methyl-1-oxopropyl)-

Cytidine, (S)-N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxy-P-methyladenylyl-(3′→5′)-2′-deoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-N-(2-methyl-1-oxopropyl)-

Thymidine, (S)-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxy-P-methyl-N-(2-methyl-1-oxopropyl)guanylyl-(3′→5′)-

Adenosine, (S)-N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxy-P-methyladenylyl-(3′→5′)-2′-deoxy-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Adenosine, (S)-N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxy-P-methyladenylyl-(3′→5′)-N-benzoyl-2′-deoxy-, 3′-benzoate

Adenosine, [P(S)]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-deoxy-P-methylthymidylyl-(3′→5′)-N-benzoyl-2′-deoxy-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Adenosine, (S)-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-deoxy-P-methylthymidylyl-(3′→5′)-N-benzoyl-2′-deoxy-, 3′-benzoate

Guanosine, (R)-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxy-P-methyl-N-(2-methyl-1-oxopropyl)cytidylyl-(3′→5′)-2′-deoxy-N-(2-methyl-1-oxopropyl)-, 3′-[2-cyanoethyl bis(1-methylethyl)phosphoramidite]

Guanosine, (R)-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxy-P-methyl-N-(2-methyl-1-oxopropyl)cytidylyl-(3′→5′)-2′-deoxy-N-(2-methyl-1-oxopropyl)-

Guanosine, (R)-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxy-P-methyl-N-(2-methyl-1-oxopropyl)cytidylyl-(3′→5′)-2′-deoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-N-(2-methyl-1-oxopropyl)-