the selective alpha-1 adrenoceptor antagonist prazosin , the selective alpha-2 adrenoceptor antagonist rauwolscine , the selective beta-1 adrenoceptor antagonist atenolol and the selective beta-2 adrenoceptor antagonist ici 118,551 were used as tools for the identification of the adrenoceptors .
C0001642
beta-1 adrenoceptor
C0034783
adrenoceptors