4-Amino-1-[5-O-[4-(4-chlorophenyl)-2-oxido-1,3,2-dioxaphosphorinan-2-yl]-β-D-arabinofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[4-(4-bromophenyl)-2-oxido-1,3,2-dioxaphosphorinan-2-yl]-β-D-arabinofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[4-(4-fluorophenyl)-2-oxido-1,3,2-dioxaphosphorinan-2-yl]-β-D-arabinofuranosyl]-2(1H)-pyrimidinone

4-Amino-1-[5-O-[4-(3-methylphenyl)-2-oxido-1,3,2-dioxaphosphorinan-2-yl]-β-D-arabinofuranosyl]-2(1H)-pyrimidinone

3-[2-Deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-5,6,7,8-tetrahydro-7-thioxopyrimido[4,5-d]pyrimidin-2(3H)-one

3-[2-Deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-5,6-dihydro-6-methylpyrimido[4,5-d]pyrimidine-2,7(1H,3H)-dione

2′-Deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-5-[(methylamino)methyl]cytidine

3′,5′-Bis-O-[(1,1-dimethylethyl)dimethylsilyl]-α-[methyl(2,2,2-trifluoroacetyl)amino]thymidine

3′,5′-Bis-O-[(1,1-dimethylethyl)dimethylsilyl]-α-(methylamino)thymidine

3-[2-Deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-3,5,6,7-tetrahydro-1H-pyrimido[4,5-d][1,3]diazepine-2,8-dione

5-(2-Aminoethyl)-2′-deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]cytidine

5-(Cyanomethyl)-2′-deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]cytidine

α-Cyano-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]thymidine

3-(2-Deoxy-β-D-erythro-pentofuranosyl)-5,6,7,8-tetrahydro-7-thioxopyrimido[4,5-d]pyrimidin-2(3H)-one

3-(2-Deoxy-β-D-erythro-pentofuranosyl)-5,6-dihydro-6-methylpyrimido[4,5-d]pyrimidine-2,7(1H,3H)-dione

3-(2-Deoxy-β-D-erythro-pentofuranosyl)-3,5,6,7-tetrahydro-1H-pyrimido[4,5-d][1,3]diazepine-2,8-dione

6-Methyl-9-[2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-9H-purine

1,3-Dihydro-5-hydroxy-1-β-D-ribofuranosyl-2H-1,3-diazepin-2-one

Guanosine, cyclic 3′,5′-[(4,5-dimethoxy-2-nitrophenyl)methyl phosphate]

Adenosine, cyclic 3′,5′-[(4,5-dimethoxy-2-nitrophenyl)methyl phosphate]