intrathecal ( i.th . ) administration of the mu agonists [ d-ala2 , nmephe4 , gly-ol ] enkephalin ( dago ) , [ n-mephe3 , d-pro4 ] enkephalin ( pl017 ) , morphine and normorphine , as well as the delta agonist [ d-pen2 , d-pen5 ] enkephalin ( dpdpe ) , resulted in an equieffective inhibition of volume-initiated contractions of the urinary bladder .
C0014298
enkephalin
C0525856
dpdpe