我们从杜鹃花科植物羊踯躅(Rhododendron molle G·Don)的成熟果实(湖北俗称八厘麻)中提得结晶性有效成分八厘麻毒素以来,不断改进,确定了提取分离的方法为;取八厘麻粗粉1000g,加80%乙醇4000ml,回流3～5小时,连续4次,每次更换新的乙醇,合并滤液。回收乙醇(减压浓缩)后,加醋酸铅至沉淀完全,于滤液中再加碱式醋酸铅沉淀,滤过。以饱和硫酸钠脱铅,继以 H_2S 去尽余 We have improved the method of extracting and isolating from the mature fruit of Rhododendron molle G. Don, which is commonly known in Hubei, as the crystalline active ingredient octopoid. Take 1000g of hemp coarse powder 1000g, add 80% ethanol 4000ml, reflux 3 to 5 hours, 4 times in a row, each time to replace the new ethanol, the combined filtrate. After recovering ethanol (concentration under reduced pressure), lead acetate is added until precipitation is complete, and basic lead acetate is added to the filtrate for precipitation. Dephosphorization with saturated sodium sulfate followed by H_2S