β-Adrenergic agonist, related to clenbuterol and mabuterol, q.q.v. Prepn: G. Engelhardt et al., DE 2261914 (1974 to Thomae). Pharmacology: G. Engelhardt, Arzneim.-Forsch. 34, 1625 (1984). Pharmacokinetics: T. M. Byrem et al., J. Anim. Sci. 70, 3812 (1992). Effect on lipid metabolism in sheep: C. Y. Hu et al., ibid. 66, 1393 (1988). Efficacy as a repartitioning agent in livestock: R. W. Jones et al., ibid. 61, 905 (1985); D. H. Beermann et al., ibid. 62, 370 (1986); A. P. Molony et al., Livestock Prod. Sci. 42, 23, 35 (1995).