The molecule is a methanesulfonate (mesylate) salt prepared from equimolar amounts of osimertinib and methanesulfonic acid. Used for treatment of EGFR T790M mutation positive non-small cell lung cancer. It has a role as an antineoplastic agent and an epidermal growth factor receptor antagonist. It contains an osimertinib(1+).
N-[2-[2-(dimethylamino)ethyl-methylamino]-4-methoxy-5-[[4-(1-methylindol-3-yl)pyrimidin-2-yl]amino]phenyl]prop-2-enamide;methanesulfonic acid