title: In search of the opiate receptor.
mesh_terms: D000818:Animals; D001665:Binding Sites; D001921:Brain / Q000378:metabolism; D001923:Brain Chemistry; D055598:Chemical Phenomena; D002621:Chemistry; D002846:Chromatography, Affinity; D003521:Cyclopropanes / Q000494:pharmacology; D007202:Indicators and Reagents; D007422:Intestines; D007981:Levorphanol / Q000494:pharmacology; D008691:Methadone / Q000494:pharmacology; D009019:Morphinans / Q000494:pharmacology*; D009020:Morphine / Q000037:antagonists & inhibitors / Q000378:metabolism / Q000494:pharmacology*; D009269:Nalorphine; D009270:Naloxone / Q000494:pharmacology; D009292:Narcotic Antagonists / Q000494:pharmacology*; D009294:Narcotics / Q000494:pharmacology*; D000439:Pentanols / Q000494:pharmacology; D051381:Rats; D011955:Receptors, Drug; D014316:Tritium
chemical_list: D003521:Cyclopropanes; D007202:Indicators and Reagents; D009019:Morphinans; D009292:Narcotic Antagonists; D009294:Narcotics; D000439:Pentanols; D011955:Receptors, Drug; D014316:Tritium; D007981:Levorphanol; D009270:Naloxone; D009020:Morphine; D009269:Nalorphine; D008691:Methadone