US8980901B2 - 5-Fluoro-3-Phenyl-2[1-(9h-Purin-6-Ylamino)propyl]-3h-Quinazolin-4-One and 6-Fluoro-3-Phenyl-2-[1-(9h-Purin-6-Ylamino)ethyl]-3h-Quinazolin-4-One as Inhibitors of Human Phosphatidylinositol 3-Kinase Delta