enkephalin analogues ( the mu receptor agonist tyr-d-ala-gly-mephe-nh ( ch2 ) 2oh ( dago ) , the delta receptor agonist ( d-ala2-d-leu5 ) - enkephalin ( dadle ) and metkephamid , which has been reported to be particularly efficacious at the delta receptor ) were administered intracerebroventricularly 3-5 min . prior to hypertonic saline .
C0525773
dago
C0014298
enkephalin