N-[2-[[3-[2-Deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-2,3-dihydro-2-oxo-1H-pyrimido[5,4-b][1,4]benzoxazin-9-yl]oxy]ethyl]-N′-[(2R)-2-hydroxy-3-mercaptopropyl]urea

1-[5-O-[2-(Acetyloxy)benzoyl]-β-D-ribofuranosyl]-1H-1,2,4-triazole-3-carboxamide

9-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-2-[2-(4-nitrophenyl)ethoxy]-9H-purine

9-(2-Deoxy-β-D-erythro-pentofuranosyl)-1,9-dihydro-1-[2-(4-nitrophenyl)ethyl]-2H-purin-2-one

9-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-2-[2-(4-nitrophenyl)ethoxy]-9H-purine

9-(2-Deoxy-β-D-erythro-pentofuranosyl)-2-[2-(4-nitrophenyl)ethoxy]-9H-purine

2H-Purin-2-one, 9-(3,5-di-O-acetyl-2-deoxy-β-D-erythro-pentofuranosyl)-1,9-dihydro-

1-[2,3,5-Tris-O-(1-oxododecyl)-β-D-ribofuranosyl]-1H-1,2,4-triazole-3-carboxamide