we have demonstrated that three delta-receptor agonists [ d-ala2 , d-leu5 ] enkephalin ( dadle ) , [ d-pen2 , d-pen5 ] enkephalin ( dpdpe ) and [ d-thr2 , leu5 , thr6 ] enkephalin ( dtlet ) appear to mediate their effects via the delta-receptor since they are readily reversed by the selective delta-receptor antagonist ici 174864 .
C0525856
dpdpe
C0014298
enkephalin