the 125i-labeled iodohydroxybenzylpindolol ( ihyp ) binding to beta-receptors on brain micro-vessels is inhibited by isoproterenol , epinephrine and norepinephrine , with ki values of 2 x 10 ( -7 ) m , 2.5 x 10 ( -6 ) m and 1.2 x 10 ( -5 ) m , respectively .
C0014563
epinephrine
C0028351
norepinephrine