(1R,3R,4S,7R)-3-(6-amino-2-fluoro-9H-purin-9-yl)-2,5-dioxabicyclo[2.2.1]heptan-7-ol;9-(2,5-Anhydro-ß-D-arabinofuranosyl)-2-fluoro-9H-purin-6-amine;
(1R,3R,4S,7R)-3-(6-amino-2-fluoro-9H-purin-9-yl)-2,5-dioxabicyclo[2.2.1]heptan-7-ol;9-(2,5-Anhydro-ß-D-arabinofuranosyl)-2-fluoro-9H-purin-6-amine;