new opioid peptides selective for kappa receptor

摘要

The present invention provides novel opioid peptides which are selective for the kappa opiate receptor. In one embodiment, the kappa-selective opioid peptides have the general structure (D)Phe-D4-E5-F6 (SEQ ID NO. 29), wherein D4 is (D)NapAla or (D)Phe, E5 is (D)Nle, Trp, or (D)Ile, and F6 is (D)Arg or (D)ChAla.