adrenergic agonists and antagonists competed for binding of [ 125i ] heat with the expected order of potency for an alpha 1-receptor , ( - ) epinephrine greater than or equal to ( - ) norepinephrine greater than ( + ) epinephrine greater than isoproterenol and prazosin greater than phentolamine greater than yohimbine .
C0028351
norepinephrine
C0014563
epinephrine