3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-2,2-difluoro-β-D-erythro-pentofuranosyl]-1,3-dihydro-6-phenyl-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-2,2-difluoro-β-D-erythro-pentofuranosyl]-1,3-dihydro-6-phenyl-2H-pyrrolo[2,3-d]pyrimidin-2-one

3-(2-Deoxy-2,2-difluoro-β-D-erythro-pentofuranosyl)-1,3-dihydro-6-phenyl-2H-pyrrolo[2,3-d]pyrimidin-2-one

1-β-D-Ribofuranosyl-1H-imidazole-4,5-dicarbonitrile

9-(3-Amino-3-deoxy-β-L-ribofuranosyl)-9H-purin-6-amine