title: Stereospecific aversive property of narcotic antagonists in morphine-free rats.
mesh_terms: D000818:Animals; D001362:Avoidance Learning / Q000187:drug effects*; D008297:Male; D009020:Morphine / Q000494:pharmacology; D009270:Naloxone / Q000494:pharmacology; D009271:Naltrexone / Q000494:pharmacology; D009292:Narcotic Antagonists / Q000494:pharmacology*; D051381:Rats; D013237:Stereoisomerism; D013329:Structure-Activity Relationship
chemical_list: D009292:Narcotic Antagonists; D009270:Naloxone; D009271:Naltrexone; D009020:Morphine