A series of novel 3,4,7-trisubstituted benzofuran derivatives were synthesized, and their binding affinity to κ- (KOR) and μ-opioid receptors (MOR) were evaluated. Several aryl ethers showed moderate binding activities to KOR (IC50=3.9-11 µM) without binding to MOR.

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http://dx.doi.org/10.1248/cpb.c16-00302DOI Listing

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