“In view of our findings that butoxamine, a … antagonist, antagonized the isoproterenol-induced blood lactate, while practolol , a selective 1 -antagonist, effectively … actions of isoproterenol on FFA, glycerol and insulin, it is concluded that procaterol is a more selective … than isoproterenol or trimetoquinol, and is more potent than salbutamol.”