Mubritinib (TAK-165) is a protein kinase inhibitor which was under development by Takeda for the treatment of cancer. It completed phase I clinical trials but appears to have been discontinued, as no new information on the drug has surfaced since December 2008.RET inhibitors: Vandetanib (also VEGFR and EGFR). Entrectinib (ALK, ROS1, NTRK).c-MET inhibitor: Cabozantinib (also VEGFR2). Mubritinib (TAK-165) is a protein kinase inhibitor which was under development by Takeda for the treatment of cancer. It completed phase I clinical trials but appears to have been discontinued, as no new information on the drug has surfaced since December 2008.