[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][Branch1][C][C][N][C][C][Branch2][Ring1][Ring1][C][O][C][=C][C][=C][C][=C][Ring1][=Branch1][C][C][C][C][C][C][Ring1][=Branch1][O].[Cl]"}, {"from": "gpt", "value": "The molecule is the hydrochloride form of exaprolol, a lipophilic derivative of the adrenergic blocking agent propranolol with sympatholytic activity. Exaprolol competitively binds to and blocks beta-adrenergic receptors in the heart and vascular smooth muscle, thereby causing negative chronotropic and inotropic effects leading to a reduction in cardiac output."}]