series of 1- ( 4-amino-phenyl ) -2-aminoethanol derivatives having different substituents in the phenyl nucleus were compared with 1- ( 4-amino-3,5-dichloro-phenyl ) -2-tert.-butylamino-ethanol ( clenbuterol ) with regard to their action on the adrenergic beta-receptors of guinea pigs , cats and rats .
C0007610
nucleus
C0754515
tert