the receptor subtype was shown to be ( at least predominantly ) beta 2 by the order of potency for beta-agonists ( isoprenaline approximately equal to fenoterol much greater than adrenaline greater than noradrenaline ) and by the relative potency of selective beta-antagonists ( ici 118,551 much greater than atenolol ) .
C0014563
adrenaline
C0028351
noradrenaline