title: [Comparisons of a new opioid agonist-antagonist "cyclazocine" and morphine in anesthesia for patients undergoing open-heart operation].
mesh_terms: D000328:Adult; D000758:Anesthesia; D006348:Cardiac Surgical Procedures; D003496:Cyclazocine / Q000494:pharmacology; D006439:Hemodynamics / Q000187:drug effects; D006801:Humans; D008875:Middle Aged; D009020:Morphine / Q000494:pharmacology
chemical_list: D009020:Morphine; D003496:Cyclazocine