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1·Objective To study the effect of clenbuterol on limb bud cells of embryo of rats.

目的探讨盐酸克伦特罗对大鼠胚胎肢芽细胞的影响。

2·Conclusions: the limb bud extract showed marked motoneuron neurotrophic activities compared with the two controls.

结论：与两对照组相比，胎鼠肢芽提取液呈现了显著的运动神经营养活性。