title: Novel analgesics and molecular rearrangements in the morphine-thebaine group. XXV. Substitution of the piperidine ring in derivatives of 6,14-endo-ethenotetrahydrothebaine.
mesh_terms: D000700:Analgesics / Q000138:chemical synthesis*; D000818:Animals; D003500:Cyclization; D009682:Magnetic Resonance Spectroscopy; D009020:Morphine; D010880:Piperidines; D051381:Rats; D013797:Thebaine
chemical_list: D000700:Analgesics; D010880:Piperidines; D013797:Thebaine; D009020:Morphine