intracisternal administration of the selective mu receptor agonist [ d-ala2 , nme-phe4 , gly-ol5 ] enkephalin ( dago ) , 2.9 nmol , also increased plasma concentrations of the 3 catecholamines and , furthermore , these effects were significantly greater than those noted in response to equimolar beta-endorphin .
C0014298
enkephalin
C0525773
dago