under conditions that completely dissociate the parent opioids , naltrexone , naloxone , and oxymorphone , the derivative l- ( n-fluoresceinyl naltrexone thiosemicarbazone ( 6-fnx ) and the opioid-steroid hybrids naloxone estrone azine ( n-eh ) and androstene bisoxymorphone azine ( o-ad-o ) showed more persistent receptor blockade than the bivalent opioid naloxonazine ( naz ) .
C0027360
naltrexone
C0027358
naloxone