红牛夕是苋科植物柳叶牛夕(Achyranthus Lonoifolia Makino)的干燥根茎,60年代后期分离出脱皮甾酮(Ecdysterone),牛夕生酮(Inokosterone)。为了探索抗生育作用的有效部分或成分,利用这一丰富资源,首先用70％乙醇提取物6668mg/Kg,灌胃妊娠第一至十天小白鼠抗生育效果非常显著,抗着床效果亦显著。丁醇提取物1/3.6LD_(50)剂量—2500mg/Kg灌胃抗着床,1/4.5LD_(50)剂量—2000mg/Kg,抗早 Red Bull is the dry root of Achyranthus Lonoifolia Makino, and Ecdysterone and Inokosterone were isolated in the late 1960s. In order to explore the effective part or component of anti-fertility effect, using this rich resource, the first 70% ethanol extract 6668mg/Kg, the first to ten days of gavage pregnancy mice anti-fertility effect is very significant, anti-implantation effect is also significant . Butanol extract 1/3.6LD_(50) dose - 2500mg/Kg gavage anti-implantation, 1/4.5LD_(50) dose - 2000mg/Kg, anti-early