the interactions of a proposed , selective delta receptor antagonist ( ici 174,864 ) and selective agonists at mu and delta receptors , [ d-ala2 , nmephe4 , gly-ol ] -enkephalin ( dago ) and [ d-pen2 , d-pen5 ] -enkephalin ( dpdpe ) , respectively , have been studied using the electrically-stimulated mouse isolated vas deferens ( mvd ) and the guinea-pig isolated ileum ( gpi ) .
C0014298
enkephalin
C0525856
dpdpe