[{"from": "human", "value": "Describe this molecule. [C][C][O][C][=Branch1][C][=O][C][Branch1][O][C][C][N][Branch1][Branch1][C][C][Ring1][=Branch1][C][C][=C][C][=C][C][=C][Ring1][=Branch1].[Cl]"}, {"from": "gpt", "value": "The molecule is the hydrochloride salt of a synthetic piperidine ester with opioid analgesic activity. Meperidine mimics the actions of endogenous neuropeptides via opioid receptors such as the mu-opioid receptor, thereby producing characteristic morphine-like effects including analgesia, euphoria, sedation, respiratory depression, miosis, bradycardia and physical dependence."}]