of the tested catecholamines , isoprenaline , phenylephrine , butylated hydroxytoluene-920 ( bht-920 ) and clonidine were ineffective whereas the potency order for other catecholamines was dopamine greater than noradrenaline greater than or equal to adrenaline greater than dopa .
C0007412
catecholamines
C0028351
noradrenaline