(2R,5R)-5-(6-Amino-2-fluoro-9H-purin-9-yl)-2-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-2-ethynyldihydro-3(2H)-furanone

(2R,5R)-5-(4-Amino-5-fluoro-7H-pyrrolo[2,3-d]pyrimidin-7-yl)-2-[[[(1,1-dimethylethyl)diphenylsilyl]oxy]methyl]-2-ethynyldihydro-3(2H)-furanone

N-[3-[4-Amino-7-[2-deoxy-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-5-yl]-2-propyn-1-yl]-2-(2-hydroxyethoxy)acetamide

2-[2-(Acetyloxy)ethoxy]-N-[3-[4-amino-7-(2-deoxy-β-D-erythro-pentofuranosyl)-7H-pyrrolo[2,3-d]pyrimidin-5-yl]-2-propyn-1-yl]acetamide