The succinate salt form of foritinib, an orally bioavailable inhibitor of the receptor tyrosine kinases anaplastic lymphoma kinase (ALK) and C-ros oncogene 1 (ROS1), with potential antineoplastic activity. Upon oral administration, foritinib targets, binds to and inhibits the activity of ALK and ROS1, which leads to the disruption of ALK- and ROS1-mediated signaling and the inhibition of cell growth in ALK- and ROS1-expressing tumor cells. In addition, foritinib is able to cross the blood brain barrier. ALK and ROS1, overexpressed or mutated in many tumor cell types, play key roles in tumor cell proliferation, survival, invasion and metastasis.