Potent, long-acting agonist specific to beta2 (Ki = 7.6 nM), but not beta1 (Ki > 2.6 µM), adrenergic receptors in trachea (pD2 = 9.3) over atrium (pD2 = 7.0).1,2 Reduces adhesion and superoxide anion production in cultured activated eosinophils.3 Reverses cach
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