this substance also antagonized the inhibition of spontaneous bladder contractions produced by submaximal i.c.v . doses of the highly selective mu opioid agonist [ d-ala2-mephe4 , gly- ( ol ) 5 ] enkephalin ( dago ) and the delta opioid agonist [ d-pen2 , d-pen5 ] enkephalin ( dpdpe ) .
C0014298
enkephalin
C0525773
dago