title: Contribution of 'receptor' affinity to analgesic potency.
mesh_terms: D000433:1-Propanol / Q000494:pharmacology; D000700:Analgesics / Q000494:pharmacology*; D000818:Animals; D001667:Binding, Competitive; D001921:Brain / Q000187:drug effects*; D003521:Cyclopropanes / Q000494:pharmacology; D005283:Fentanyl / Q000494:pharmacology; D006168:Guinea Pigs; D004091:Hydromorphone / Q000494:pharmacology; D066298:In Vitro Techniques; D007275:Injections, Intravenous; D007981:Levorphanol / Q000494:pharmacology; D008614:Meperidine / Q000494:pharmacology; D008691:Methadone / Q000494:pharmacology; D009019:Morphinans / Q000494:pharmacology; D009020:Morphine / Q000494:pharmacology; D000439:Pentanols / Q000494:pharmacology; D011955:Receptors, Drug / Q000187:drug effects*
chemical_list: D000700:Analgesics; D003521:Cyclopropanes; D009019:Morphinans; D000439:Pentanols; D011955:Receptors, Drug; D007981:Levorphanol; D009020:Morphine; D000433:1-Propanol; D008614:Meperidine; D004091:Hydromorphone; D008691:Methadone; D005283:Fentanyl