after elimination of all known factors interfering with the concentration of the sympathomimetic agonists in the biophase , the ratios between the ed50 's of each amine for alpha- and beta-adrenoceptors were : adrenaline = 34 , noradrenaline = 109 and isoprenaline = 0.0041 .
C0014563
adrenaline
C0028351
noradrenaline