when various alpha- and beta-adrenergic agonists or antagonists were tested for their ability to inhibit [ 3h ] dhe binding the following ki values ( microm ) were obtained : dhe ( 0.039 ) , phentolamine ( 0.102 ) , phenoxybenzamine ( 0.262 ) , methysergide ( 0.670 ) , l-epinephrine ( 2.27 ) , serotonin ( 3.09 ) , l-norepinephrine ( 3.20 ) , octopamine ( 30.3 ) , l-propranolol ( 1710 ) , l-isoproterenol ( greater than 2000 ) .
C0014563
epinephrine
C0028351
l-norepinephrine