the effect of the delta-selective agonist [ d-pen2 , d-pen5 ] enkephalin ( dpdpe ) on the antinociception produced by intracerebroventricular ( i.c.v . ) administration of the mu agonists morphine , [ d-ala2 , nmephe4 , gly-ol5 ] enkephalin ( dago ) , [ nmephe3 , d-pro4 ] morphiceptin ( plo17 ) , beta-endorphin , phenazocine , etorphine and sufentanil was studied in mice .
C0014298
enkephalin
C0525773
dago