1-[6-[[(3R)-Tetrahydro-3-furanyl]amino]-9-[2,3,5-tris-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-ribofuranosyl]-9H-purin-2-yl]-1H-pyrazole-4-carboxylic acid

Ethyl 1-[6-[[(3R)-tetrahydro-3-furanyl]amino]-9-[2,3,5-tris-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-ribofuranosyl]-9H-purin-2-yl]-1H-pyrazole-4-carboxylate

Guanosine, 8-[acetyl(7-butyl-9H-fluoren-2-yl)amino]-

Uridine, 5-(1E)-1,3-butadienyl-2′-deoxy-

5′-Deoxy-5′-[[(3S)-4-(1,1-dimethylethoxy)-3-[[(1,1-dimethylethoxy)carbonyl]amino]-4-oxobutyl](2-hydroxyethyl)amino]-2′,3′-bis-O-(triethylsilyl)adenosine

Cytidylyl-(3′→5′)-guanylyl-(3′→5′)-adenylyl-(3′→5′)-uridylyl-(3′→5′)-adenosine

4-Amino-7-(2-deoxy-β-D-erythro-pentofuranosyl)-3,7-dihydro-2H-pyrrolo[2,3-h]quinazolin-2-one

2-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]pyrimido[5,4-e]pyrrolo[1,2-c]pyrimidine-3,6(2H,4H)-dione

2-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]pyrimido[5,4-e]pyrrolo[1,2-c]pyrimidine-3,6(2H,4H)-dione

2-(2-Deoxy-β-D-erythro-pentofuranosyl)pyrimido[5,4-e]pyrrolo[1,2-c]pyrimidine-3,6(2H,4H)-dione

7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-4,7-dihydro-2,4-dioxo-N1,N1,N3,N3-tetraphenyl-1H-pyrrolo[2,3-d]pyrimidine-1,3(2H)-dicarboxamide

7-[2-Deoxy-5-O-[(diphenylamino)carbonyl]-β-D-erythro-pentofuranosyl]-4,7-dihydro-2,4-dioxo-N1,N1,N3,N3-tetraphenyl-1H-pyrrolo[2,3-d]pyrimidine-1,3(2H)-dicarboxamide

7-(2-Deoxy-β-D-erythro-pentofuranosyl)-4,7-dihydro-2,4-dioxo-N1,N1,N3,N3-tetraphenyl-1H-pyrrolo[2,3-d]pyrimidine-1,3(2H)-dicarboxamide

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-2,6-di-O-2-propen-1-ylxanthosine

7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-2,4-bis(2-propen-1-yloxy)-7H-pyrrolo[2,3-d]pyrimidine

2′-Deoxy-2,6-di-O-2-propen-1-ylxanthosine

7-(2-Deoxy-β-D-erythro-pentofuranosyl)-2,4-bis(2-propen-1-yloxy)-7H-pyrrolo[2,3-d]pyrimidine

7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-2,4-bis[2-(4-nitrophenyl)ethoxy]-7H-pyrrolo[2,3-d]pyrimidine

7-(2-Deoxy-β-D-erythro-pentofuranosyl)-2,4-bis[2-(4-nitrophenyl)ethoxy]-7H-pyrrolo[2,3-d]pyrimidine

7-(3,5-Di-O-acetyl-2-deoxy-β-D-erythro-pentofuranosyl)-2,4-bis[2-(4-nitrophenyl)ethoxy]-7H-pyrrolo[2,3-d]pyrimidine