whereas the mu-agonist dago ( d-ala2-gly-ol5-enkephalin ) showed significant depressant effects , two other mu-agonists morphine and morphiceptine , as well as the delta-agonists dadle ( d-ala2-d-leu5-enkephalin ) and leu-enkephalin were much less inhibitory .
C0014298
enkephalin
C0014294
leu-enkephalin