132722-90-8 2'-F-Ara-ddp 9-(2',3'-Dideoxy-2'-fluoroarabinofuranosyl)purine 9-(2,3-Dideoxy-2-fluoro-beta-D-threo-pentafuranosyl)-9H-purine 9H-Purine, 9-(2,3-dideoxy-2-fluoro-beta-D-threo-pentafuranosyl)-