5-[3-[1-(3,5-Di-O-acetyl-2-deoxy-β-D-erythro-pentofuranosyl)-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]propyl]-2′-deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]uridine

2-Chlorophenyl hydrogen 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-5-[2-[1-(3,5-di-O-acetyl-2-deoxy-β-D-erythro-pentofuranosyl)-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]ethyl]-3′-uridylate

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-5-[2-[1-(3,5-di-O-acetyl-2-deoxy-β-D-erythro-pentofuranosyl)-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]ethyl]uridine

2′-Deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-5-(1-hydroxy-2-propyn-1-yl)uridine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-α-[1-(3,5-di-O-acetyl-2-deoxy-β-D-erythro-pentofuranosyl)-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]thymidine

α-[1-(3,5-Di-O-acetyl-2-deoxy-β-D-erythro-pentofuranosyl)-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]thymidine

α-[1-[2-Deoxy-3,5-bis-O-(triethylsilyl)-β-D-erythro-pentofuranosyl]-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-α-hydroxy-3-[(phenylmethoxy)methyl]thymidine

α-[1-(3,5-Di-O-acetyl-2-deoxy-β-D-erythro-pentofuranosyl)-1,2,3,4-tetrahydro-2,4-dioxo-5-pyrimidinyl]-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-α-hydroxy-3-[(phenylmethoxy)methyl]thymidine

2′-Deoxy-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-5-formyl-3-[(phenylmethoxy)methyl]uridine

2′-Deoxy-5,6-dihydro-5-(phenylseleno)-3′,5′-bis-O-(triethylsilyl)uridine

6-Amino-3-[2-(4-fluorophenyl)ethyl]-1,5-dihydro-1-(5-O-phosphono-β-D-ribofuranosyl)-4H-pyrazolo[3,4-d]pyrimidin-4-one

3-[2-(1-Naphthalenyl)ethyl]-1-(5-O-phosphono-β-D-ribofuranosyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine

Cytidine 5′-(trihydrogen diphosphate), P′→1-ester with D-myo-inositol

6-Amino-1,5-dihydro-3-(3-phenylpropyl)-1-(5-O-phosphono-β-D-ribofuranosyl)-4H-pyrazolo[3,4-d]pyrimidin-4-one

6-Amino-1,5-dihydro-3-(2-phenylethyl)-1-(5-O-phosphono-β-D-ribofuranosyl)-4H-pyrazolo[3,4-d]pyrimidin-4-one

6-Amino-1,5-dihydro-3-(3-methylbutyl)-1-(5-O-phosphono-β-D-ribofuranosyl)-4H-pyrazolo[3,4-d]pyrimidin-4-one

3-(2-Phenylethyl)-1-(5-O-phosphono-β-D-ribofuranosyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine

6-Amino-3-(3,3-dimethylbutyl)-1,5-dihydro-1-(5-O-phosphono-β-D-ribofuranosyl)-4H-pyrazolo[3,4-d]pyrimidin-4-one

6-Amino-3-(2-cyclohexylethyl)-1,5-dihydro-1-(5-O-phosphono-β-D-ribofuranosyl)-4H-pyrazolo[3,4-d]pyrimidin-4-one

3-(2-Phenylethyl)-1-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine