the rank order potency of displacing ligands was the same for both membrane-bound and soluble alpha-1 adrenoceptors [ prazosin greater than phentolamine greater than yohimbine and ( - ) -epinephrine = ( - ) -norepinephrine much greater than ( + ) -norepinephrine ] .
C0014563
epinephrine
C0028351
norepinephrine