intracerebroventricular administration of equieffective doses of the mu agonists [ d-ala2 , nmphe4 , gly-ol ] enkephalin ( damgo ) , [ n-mephe3 , d-pro4 ] enkephalin ( pl017 ) , morphine , normorphine , sufentanil , etorphine , phenazocine , meperidine and methadone inhibited spontaneous bladder contractions for approximately 20 to 30 min .
C0525773
damgo
C0014298
enkephalin