vascular smooth muscle alpha adrenoceptors in the proximal end of the rat isolated tail artery have been classified by determining pa2 values and -log kb values for the antagonists prazosin , corynanthine and idazoxan ( rx 781094 , a new synthetic alpha-2 adrenoceptor antagonist ) against norepinephrine .
C0034784
alpha adrenoceptors
C0001639
alpha-2 adrenoceptor