title: Chemical tools in opioid research.
authors.affiliation: Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis 55455.
authors.forename: P S
authors.initials: PS
authors.lastname: Portoghese
mesh_terms: D000818:Animals; D004723:Endorphins / Q000138:chemical synthesis / Q000494:pharmacology*; D006801:Humans; D011957:Receptors, Opioid / Q000187:drug effects*
chemical_list: D004723:Endorphins; D011957:Receptors, Opioid