title: Quaternary naltrexone: evidence for the central mediation of discriminative stimulus effects of narcotic agonists and antagonists.
mesh_terms: D000818:Animals; D001921:Brain / Q000187:drug effects*; D010856:Columbidae; D004192:Discrimination, Psychological / Q000187:drug effects*; D005048:Etorphine / Q000037:antagonists & inhibitors; D008253:Macaca mulatta; D008297:Male; D009020:Morphine / Q000037:antagonists & inhibitors; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects; D009270:Naloxone / Q000031:analogs & derivatives*; D009271:Naltrexone / Q000031:analogs & derivatives* / Q000494:pharmacology; D009292:Narcotic Antagonists / Q000494:pharmacology*; D009294:Narcotics / Q000494:pharmacology*; D011957:Receptors, Opioid / Q000378:metabolism
chemical_list: D009292:Narcotic Antagonists; D009294:Narcotics; D011957:Receptors, Opioid; D009270:Naloxone; D005048:Etorphine; D009271:Naltrexone; D009020:Morphine