[{"from": "human", "value": "Please give me some details about this molecule. [C][C][Branch1][C][C][Branch1][C][C][N][C][C@@H1][Branch2][Ring1][C][C][O][C][=C][C][=C][C][=C][Ring1][=Branch1][C][C][C][C][C][Ring1][Branch1][O]"}, {"from": "gpt", "value": "The molecule is a nonselective beta-adrenergic receptor blocker (beta-blocker) used for the therapy of hypertension. Penbutolol has yet to be convincingly associated with clinically apparent liver injury."}]