Propanoic acid, 2,2-dimethyl-, 2,3,3a,9a-tetrahydro-6-oxo-2-[[(trifluoroacetyl)oxy]methyl]-6H-furo[2′,3′:4,5]oxazolo[3,2-a]pyrimidin-3-yl ester, [2R-(2α,3β,3aβ,9aβ)]-

Propanoic acid, 2,2-dimethyl-, [2,3,3a,9a-tetrahydro-6-oxo-3-[(trifluoroacetyl)oxy]-6H-furo[2′,3′:4,5]oxazolo[3,2-a]pyrimidin-2-yl]methyl ester, [2R-(2α,3β,3aβ,9aβ)]-

Propanoic acid, 2,2-dimethyl-, 2,3,3a,9a-tetrahydro-6-oxo-2-[[(trimethylsilyl)oxy]methyl]-6H-furo[2′,3′:4,5]oxazolo[3,2-a]pyrimidin-3-yl ester, [2R-(2α,3β,3aβ,9aβ)]-

Propanoic acid, 2,2-dimethyl-, [2,3,3a,9a-tetrahydro-6-oxo-3-[(trimethylsilyl)oxy]-6H-furo[2′,3′:4,5]oxazolo[3,2-a]pyrimidin-2-yl]methyl ester, [2R-(2α,3β,3aβ,9aβ)]-

Propanoic acid, 2,2-dimethyl-, (2,3,3a,9a-tetrahydro-3-hydroxy-6-oxo-6H-furo[2′,3′:4,5]oxazolo[3,2-a]pyrimidin-2-yl)methyl ester, [2R-(2α,3β,3aβ,9aβ)]-

Propanoic acid, 2,2-dimethyl-, [3-(acetyloxy)-2,3,3a,9a-tetrahydro-6-oxo-6H-furo[2′,3′:4,5]oxazolo[3,2-a]pyrimidin-2-yl]methyl ester, [2R-(2α,3β,3aβ,9aβ)]-

Acetic acid, trifluoro-, 2-[(acetyloxy)methyl]-2,3,3a,9a-tetrahydro-6-oxo-6H-furo[2′,3′:4,5]oxazolo[3,2-a]pyrimidin-3-yl ester, [2R-(2α,3β,3aβ,9aβ)]-

Acetic acid, trifluoro-, [3-(acetyloxy)-2,3,3a,9a-tetrahydro-6-oxo-6H-furo[2′,3′:4,5]oxazolo[3,2-a]pyrimidin-2-yl]methyl ester, [2R-(2α,3β,3aβ,9aβ)]-

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

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

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

Adenosine, N,N-diethyl-, cyclic 3′,5′-(diethylphosphoramidate) 2′-acetate

Adenosine, N,N-dimethyl-, cyclic 3′,5′-(dimethylphosphoramidate)

Guanosine, cyclic 3′,5′-(dimethylphosphoramidate)

Guanosine, N-acetyl-, cyclic 3′-(hydrogen phosphate) 2′-acetate

Adenosine, cyclic 3′,5′-(dimethylphosphoramidate)

Adenosine, N-acetyl-, cyclic 3′,5′-(dimethylphosphoramidate) 2′-acetate

Cytidine, 2′-deoxycytidylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxyguanylyl-(3′→5′)-2′-deoxyguanylyl-(3′→5′)-2′-deoxyadenylyl-(3′→5′)-2′-deoxyadenylyl-(3′→5′)-thymidylyl-(3′→5′)-2′-deoxy-

2′-Deoxycytidylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxyadenylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxyadenosine

2′-Deoxyadenylyl-(3′→5′)-2′-deoxyguanylyl-(3′→5′)-2′-deoxyadenylyl-(3′→5′)-2′-deoxyguanylyl-(3′→5′)-thymidylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-thymidine