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Synthesis and μ‑Opioid Activity of the Primary Metabolites of Carfentanil

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journal contribution
posted on 16.10.2019, 15:51 by Fu-Lian Hsu, Andrew J. Walz, James M. Myslinski, Li Kong, Michael G. Feasel, Tyler D. P. Goralski, Tim Rose, Nicholas J. Cooper, Neil Roughley, Christopher M. Timperley
Carfentanil is a synthetic opioid significantly more potent than clinically prescribed fentanyl. The primary metabolites of carfentanil, generated from human liver microsomes, were structurally confirmed through chemical synthesis. The synthesized compounds were evaluated for μ-opioid receptor (MOR) functional activity. Of the six metabolites assayed, a major metabolite showed comparable activity to the parent opioid. Three other metabolites showed significant MOR functional activity. The availability of the metabolites could aid improvements in the analysis of biomedical samples obtained from suspected human exposures to carfentanil and development of treatment protocols.

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