Description
A long-acting β2-AR agonist (EC50s = 0.79, 63.1, and 9.4 nM for β2-, β1-, and β3-ARs, respectively); inhibits electrically-stimulated contraction of isolated guinea pig trachea strips (EC50 = 2.51 nM); inhibits histamine-induced bronchoconstriction in guinea pigs via aerosol administration at 0.12-12 mM