title: [Four long-acting analgesic hydrazone derivatives of opiates which bind more firmly with opiate receptors].
mesh_terms: D000818:Animals; D003692:Delayed-Action Preparations; D005260:Female; D006835:Hydrazones / Q000494:pharmacology*; D008297:Male; D009022:Morphine Derivatives / Q000494:pharmacology*; D009270:Naloxone / Q000031:analogs & derivatives / Q000494:pharmacology; D009294:Narcotics / Q000494:pharmacology; D011817:Rabbits; D051381:Rats; D011957:Receptors, Opioid / Q000187:drug effects*
chemical_list: D003692:Delayed-Action Preparations; D006835:Hydrazones; D009022:Morphine Derivatives; D009294:Narcotics; D011957:Receptors, Opioid; D009270:Naloxone; C024224:naloxazone