title: Editorial: searching for the endogenous analygesic.
mesh_terms: D000700:Analgesics; D000701:Analgesics, Opioid; D000818:Animals; D001923:Brain Chemistry; D002415:Cats; D010446:Peptide Fragments; D010455:Peptides; D051381:Rats; D011955:Receptors, Drug; D008083:beta-Lipotropin / Q000302:isolation & purification
chemical_list: D000700:Analgesics; D000701:Analgesics, Opioid; D010446:Peptide Fragments; D010455:Peptides; D011955:Receptors, Drug; D008083:beta-Lipotropin