the administration of naltrexone or dadle , dago , [ d-ala2 , n-mephe4 , met- ( o ) 5-ol ] enkephalin ( fk-33824 ) and morphine in doses equivalent to the ed90 doses for inducing analgesia , a few minutes before nem prevented it from interfering with dadle-elicited supraspinal analgesia when evaluated 24 h later .
C0525773
dago
C0014298
enkephalin