Evidence that the discriminative stimulus properties of fentanyl and ethylketocyclazocine are mediated by an interaction with different opiate receptors.
D000818:Animals; D001575:Benzomorphans / Q000031:analogs & derivatives / Q000494:pharmacology; D003496:Cyclazocine / Q000031:analogs & derivatives* / Q000494:pharmacology; D004193:Discrimination Learning / Q000187:drug effects; D004192:Discrimination, Psychological / Q000187:drug effects*; D016314:Ethylketocyclazocine; D005283:Fentanyl / Q000494:pharmacology*; D008297:Male; D051381:Rats; D011919:Rats, Inbred Strains; D011957:Receptors, Opioid / Q000187:drug effects*
D001575:Benzomorphans; D011957:Receptors, Opioid; C027247:MR 2266; D016314:Ethylketocyclazocine; D003496:Cyclazocine; D005283:Fentanyl