9-[2,3-dideoxy-2-fluoro-5-O-(triphenylmethyl)-β-D-threo-pentofuranosyl]-9H-purine-6-amine

((2S,4S,5R)-5-(6-chloro-9H-purin-9-yl)-4-fluorotetrahydrofuran-2-yl)methyl benzoate

6-chloro-9-[3-deoxy-5-O-(triphenylmethyl)-β-D-erythro-pentofuranosyl]-9H-purine

6-chloro-9-(3-deoxy-β-D-erythro-pentofuranosyl)-9H-purine

(S)-(-)-2-Fluoro-4-(hydroxymethyl)-2-buten-4-olide