these included the proposed mu agonist , [ d-ala2 , n-methyl-phe4 , gly5-ol ] enkephalin ( dago ) , the proposed delta agonists , [ d-pen2 , l-pen5 ] enkephalin ( dplpe ) , [ d-pen2 , d-pen5 ] enkephalin ( dpdpe ) ( conformationally constrained delta selective enkephalin analogs ) and [ d-thr2 , thr6 , leu5 ] enkephalin ( dttle ) , and the proposed kappa agonist , trans-3,4-dichloro-n-methyl-n- [ 2- ( 1-pyrolidinyl ) -cyclohexyl ] - benzeneacetamide methanesulfonate ( u-50,488h ) , as well as the nonselective mu-acting agonist , morphine .
C0525773
dago
C0014298
enkephalin