这个词是什么意思？
A derivative of the opioid alkaloid THEBAINE that is a more potent and longer lasting analgesic than MORPHINE. It appears to act as a partial agonist at mu and kappa opioid receptors and as an antagonist at delta receptors. The lack of delta-agonist activity has been suggested to account for the observation that buprenorphine tolerance may not develop with chronic use.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D002047 · MeSH 2026。
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