[ met ] enkephalin , [ leu ] enkephalin , [ d-ala2 , d-leu5 ] enkephalin and [ d-pen2 , d-pen5 ] enkephalin were more potent chemodepressants than [ d-ala2 , me-phe4 , gly-ol5 ] enkephalin , dynorphin ( 1-8 ) or ethylketocyclazocine ;
C0014295
met ] enkephalin
C0014298
enkephalin