competition of various beta-adrenergic agonists and antagonists with [ 3h ] cgp indicates an order of potency of l-isoproterenol greater than epinephrine = salbutamol greater than norepinephrine greater than d-isoproterenol and dl-propranolol = ici 118,551 much greater than atenolol , respectively .
C0014563
epinephrine
C0028351
norepinephrine