the authors examined the effect ( i.c.v . ) of the selective mu , delta and kappa opioid agonists , [ d-ala2 , mephe4 , gly5-ol ] enkephalin ( dago ) , [ d-pen2 , d-pen5 ] enkephalin and u50488h , respectively , on the body temperature of restrained and unrestrained rats .
C0525773
dago
C0014298
enkephalin