title: Synthesis of some conformationally restricted analogues of fentanyl.
mesh_terms: D000700:Analgesics / Q000138:chemical synthesis; D000818:Animals; D005283:Fentanyl / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000494:pharmacology; D008722:Methods; D051379:Mice; D008968:Molecular Conformation; D009043:Motor Activity / Q000187:drug effects
chemical_list: D000700:Analgesics; D005283:Fentanyl