CJ-15208 is a potent and selective κ-opioid receptor antagonist from a fungus, Ctenomyces serratus ATCC15502. CJ-15208 was a selective binding inhibitor for the kappa 47 nM (IC50) for kappa, 260 nM for mu, and 2,600 nM for delta. In the electrically-stimulated twitch response assay of rabbit vas deferens I recovered the suppression by a kappa agonist asimadoline with an ED50 of 1.3 microM, indicating that it is a kappa antagonist. References: De Marco R, Bedini A, Spampinato S, Cavina L, Pirazzoli E, Gentilucci L. Versatile Picklocks To Access All Opioid Receptors: Tuning the Selectivity and Functional Profile of the Cyclotetrapeptide c[Phe-d-Pro-Phe-Trp] (CJ-15,208). J Med Chem. 2016 Sep 22. [Epub ahead of print] PubMed PMID: 27607020.

纯度：≥98%

CAS：210236-47-8