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Gao Y, Liu X, Liu W, Qi Y, Liu X, Zhou Y, Wang R. Opioid receptor binding and antinociceptive activity of the analogues of endomorphin-2 and morphiceptin with phenylalanine mimics in the position 3 or 4. Bioorganic & Medicinal Chemistry Letters. 2006 Jul;16(14):3688–92. doi: 10.1016/j.bmcl.2006.04.063. |