123318-81-0 2,6-diNH2-2'F-ddP 9-(2,3-dideoxy-2-fluoro-.beta.-threo-pentofuranosyl)-2,6-diaminopurine 9H-Purine-2,6-diamine, 9-(2,3-dideoxy-2-fluoro-b-D-threo-pentofuranosyl)- AIDS-001218 AIDS001218 NSC646646