according to the concentrations which reduced the stimulation-induced overflow by 20 % ( ec20 pre ) , the rank order of potency was : adrenaline greater than oxymetazoline greater than tramazoline greater than alpha-methylnoradrenaline greater than noradrenaline greater than naphazoline greater than phenylephrine greater than methoxamine .
C0025805
alpha-methylnoradrenaline
C0028351
noradrenaline