| 摘要 |
This invention is directed generally to zilpaterol enantiomer compositions and, in particular, to compositions comprising the 6R,7R zilpaterol enantiomer. This invention is also directed to processes for making such compositions; methods for using such compositions to, for example, increase the rate of weight gain, improve feed efficiency, and/or increase carcass leanness in livestock, poultry, and/or fish; and uses of such compositions to make medicaments. This invention is further directed to methods for determining the absolute configurations of zilpaterol enantiomers.
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