[{"from": "human", "value": "Could you provide a description of this molecule? [C][N][C][=C][Branch1][O][C][=C][C][=C][C][=C][Ring1][=Branch1][Ring1][=Branch2][C][=N][C][=Branch1][=Branch1][=N][C][=C][Ring1][=Branch1][N][C][=C][Branch2][Ring1][=N][C][=C][Branch1][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][N][C][=Branch1][C][=O][C][=C][N][Branch1][C][C][C][C][N][Branch1][C][C][C][O][C].[C][S][=Branch1][C][=O][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a methanesulfonate (mesylate) salt prepared from equimolar amounts of osimertinib and methanesulfonic acid. It is 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+)."}]