1-[3,5-Bis-O-(2-chloroacetyl)-2-C-methyl-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-[2-C-Methyl-3,5-bis-O-(2,2,2-trifluoroacetyl)-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-[2-C-Methyl-3,5-bis-O-(2,2,2-trichloroacetyl)-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

Ethyl (2R,3R,3aR,9aR)-α,α-difluoro-2,3,3a,9a-tetrahydro-3-hydroxy-2-(hydroxymethyl)-6-oxo-6H-furo[2′,3′:4,5]oxazolo[3,2-a]pyrimidine-7-acetate

Ethyl α,α-difluoro-1,2,3,4-tetrahydro-2,4-dioxo-1-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-5-pyrimidineacetate

5-[2-(Diethylamino)-1,1-difluoro-2-oxoethyl]uridine

Ethyl α,α-difluoro-1,2,3,4-tetrahydro-2,4-dioxo-1-β-D-ribofuranosyl-5-pyrimidineacetate

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

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)-