the rank order of apparent affinities of agonists for the presynaptic alpha-adrenoceptors mediating inhibition of [ 3h ] na release from slices of nucleus tractus solitarii induced by 20 mm k+ , was : oxymetazoline greater than clonidine greater than adrenaline greater than alpha-methylnoradrenaline greater than noradrenaline much greater than methoxamine .
C0025805
alpha-methylnoradrenaline
C0028351
noradrenaline