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

Thymidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-deoxy-P-thioadenylyl-(3′→5′)-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-deoxy-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-

6-(1,1-Difluoroethyl)-9-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-9H-purine

6-(1-Fluoroethyl)-9-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-9H-purine

Thymidine, 5′-[methyl [P(S)]-P-[(2R,3R,3aR,4R,7R,7aS)-2-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-7-[(1,4-dioxopentyl)oxy]hexahydro-3-methoxy-4H-furo[3,2-c]pyran-4-yl]phosphonate]

Thymidine, 3′-O-[(1,1-dimethylethyl)diphenylsilyl]-, 5′-[methyl [P(S)]-P-[(2R,3R,3aR,4R,7R,7aS)-2-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-7-[(1,4-dioxopentyl)oxy]hexahydro-3-methoxy-4H-furo[3,2-c]pyran-4-yl]phosphonate]