5′-Uridylic acid, 5-thiocyanato-, cyclic 2′,3′-sulfite

5′-Cytidylic acid, N-methyl-, cyclic sulfite

5′-Cytidylic acid, 2-thio-, cyclic sulfite

5′-Cytidylic acid, 5-methyl-, cyclic sulfite

5′-Uridylic acid, 5-mercapto-, cyclic 2′,3′-sulfite

5′-Cytidylic acid, N-phenyl-, cyclic sulfite

5′-Uridylic acid, 5-methyl-, cyclic 2′,3′-sulfite

Furo[3′,2′:4,5]imidazo[1,2-a]pyrimidine-6(4H)-thione, 4-acetyl-3-(acetyloxy)-2-[(acetyloxy)methyl]-7-fluoro-2,3,3a,9a-tetrahydro-, [2R-(2α,3β,3aβ,9aβ)]-

Furo[3′,2′:4,5]imidazo[1,2-a]pyrimidin-6(4H)-one, 4-acetyl-3-(acetyloxy)-2-[(acetyloxy)methyl]-7-fluoro-2,3,3a,9a-tetrahydro-, [2R-(2α,3β,3aβ,9aβ)]-

4(1H)-Pyrimidinone, 2-amino-5-fluoro-1-[2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-

4,12-Epoxy-5H,8H-1,3-dioxolo[4,5-e]pyrimido[2,1-b][1,3]oxazocin-8-one, 9-fluoro-3a,4,12,12a-tetrahydro-2,2-dimethyl-, [3aS-(3aα,4β,12β,12aα)]-

2-Amino-5-fluoro-1-β-D-ribofuranosyl-4(1H)-pyrimidinone

2-Pyrimidinamine, 5-fluoro-1,4-dihydro-4-imino-1-[2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-

Guanosine, cyclic 3′,5′-(hydrogen phosphate) 2′-butanoate

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

6H-Furo[2′,3′:4,5]thiazolo[3,2-a]pyrimidine-2-methanol, 2,3,3a,9a-tetrahydro-3-hydroxy-6-imino-, α-(dihydrogen phosphate), [2R-(2α,3β,3aβ,9aβ)]-

5′-Cytidylic acid, 5-fluoro-, cyclic sulfite

Uridine, 5-bromo-, cyclic 2′,3′-sulfite

Thymidine, P-(2-chlorophenyl)thymidylyl-(3′→5′)-P-(2-chlorophenyl)thymidylyl-(3′→5′)-P-(2-chlorophenyl)thymidylyl-(3′→5′)-3′-O-[(4-methoxyphenyl)diphenylmethyl]-

Thymidine, P-(2-chlorophenyl)-5′-O-(phenoxyacetyl)thymidylyl-(3′→5′)-