dago ( d-ala2 , mephe4 , gly-ol5 enkephalin ) , a highly mu selective agent , produced a 67-fold difference between har and lar mice in the slopes of the dose-response curves on the hot plate assay , while dslet ( d-ser2 , leu enkephalin thr6 ) , a delta selective agent , only produced a 5.4-fold difference via the i.c.v . route .
C0525773
dago
C0014298
enkephalin