5-Chloro-N2-[4-[4-(dimethylamino)-1-piperidinyl]-2-methoxyphenyl]-N4-[2-(dimethylphosphinyl)phenyl]-2,4-pyrimidinediamine (Brigatinib, AP26113) is an investigational, targeted cancer medicine discovered internally at ARIAD Pharmaceuticals, Inc. AP26113 is a potent and selective ALK inhibitor. AP26113 is also a potent, reversible inhibitor of activated and T790M-mutant EGFR, yet it does not inhibit the native enzyme. It is in development for the treatment of patients with anaplastic lymphoma kinase positive (ALK ) non-small cell cancer (NSCLC) whose disease is resistant to crizotinib. Brigatinib is currently being evaluated in the global Phase 2 ALTA (ALK in Lung Cancer Trial of AP26113) trial that is anticipated to form the basis for its initial regulatory review. ARIAD has also initiated the Phase 3 ALTA 1L trial to assess the efficacy of brigatinib in comparison to crizotinib. In June 2016, an Expanded Access Study of brigatinib will begin. Brigatinib was granted orphan drug designation by the U.S. Food and Drug Administration (FDA) in May 2016 for the treatment of certain subtypes of non-small cell lung cancer (NSCLC). The designation is for anaplastic lymphoma kinase-positive (ALK ), c-ros 1 oncogene positive (ROS1 ), or epidermal growth factor receptor positive (EGFR ) non-small cell lung cancer (NSCLC). Brigatinib received breakthrough therapy designation from the FDA in October 2014 for the treatment of patients with ALK NSCLC whose disease is resistant to crizotinib. Both designations were based on results from an ongoing Phase 1/2 trial that showed anti-tumor activity of brigatinib in patients with ALK NSCLC, including patients with active brain metastases.