Pyrimido[5,4-c]pyridazine-6,8(4H,7H)-dione, 3,4a,5,8a-tetrahydro-7-methyl-8a-nitro-5-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)-

3a,7a-Dihydro-6-methyl-7a-nitro-4-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)-3H-pyrazolo[4,3-d]pyrimidine-5,7(4H,6H)-dione

6-Methyl-4-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)-3-(trimethylsilyl)-1H-pyrazolo[4,3-d]pyrimidine-5,7(4H,6H)-dione

7a-Fluoro-3a,7a-dihydro-6-methyl-4-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)-3-(trimethylsilyl)-1H-pyrazolo[4,3-d]pyrimidine-5,7(4H,6H)-dione

Thymidylyl-(3′→5′)-2′-deoxyguanylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxyguanylyl-(3′→5′)-2′-deoxyguanosine

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

Adenosine, 2-(1-cyclohepten-1-ylethynyl)-

Adenosine, 2-(1-cyclododecen-1-ylethynyl)-

Adenosine, 2-[(3,4-dihydro-1-naphthalenyl)ethynyl]-

Adenosine, 2-(1-cyclohexen-1-ylethynyl)-

Adenosine, 2-(1-cyclopenten-1-ylethynyl)-

Uridine, 5-methyl-3′,5′-bis-O-(phenylmethyl)-3′-C-2-propenyl-, 2′-methanesulfonate

Phosphoramidous acid, bis(1-methylethyl)-, (3aR,4R,6R,6aS)-4-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-6-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)tetrahydrofuro[3,4-b]furan-3a(4H)-yl 2-cyanoethyl ester

6H-Furo[2′,3′:4,5]oxazolo[3,2-a]pyrimidin-6-one, 2,3,3a,9a-tetrahydro-7-methyl-3-(phenylmethoxy)-2-[(phenylmethoxy)methyl]-3-(2-propenyl)-, [2R-(2α,3β,3aβ,9aβ)]-

1-[(3aR,4R,6R,6aS)-4-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]hexahydro-3a-hydroxyfuro[3,4-b]furan-6-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

5-Methyl-1-[3-C-[2-[[(4-methylphenyl)sulfonyl]oxy]ethyl]-3,5-bis-O-(phenylmethyl)-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

Uridine, 5-methyl-3′,5′-bis-O-(phenylmethyl)-3′-C-2-propenyl-, 2′-acetate

1-[(3aR,4R,6R,6aS)-Hexahydro-3a-hydroxy-4-(hydroxymethyl)furo[3,4-b]furan-6-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[3-C-(2-Hydroxyethyl)-3,5-bis-O-(phenylmethyl)-β-D-arabinofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

Uridine, 5-methyl-3′,5′-bis-O-(phenylmethyl)-3′-C-2-propenyl-