魚藤酮的提製將原料粉碎之後,用有機溶媒如醚、苯或氯仿等於室温抽出,然後将抽出液的溶煤蒸乾,在用醚抽出的時候,常在抽出或濃縮中已有魚籐酮的無色結晶析出,将其濾集,即得粗魚藤酮,在用苯或氟仿抽出時,蒸乾溶媒之後殘留黄色的树脂狀物,為魚藤酮類与树 Preparation of rotenone After the raw material is crushed, it is extracted with an organic solvent such as ether, benzene or chloroform equal to room temperature, and the dissolved coal is evaporated to dryness. When extracted with ether, the rotenone is often extracted or concentrated. The colorless crystals precipitated and were collected by filtration to obtain crude rotenone. When extracted with benzene or fluoroform, the yellow resin remained after evaporation of the solvent, which was a rotenone and a tree.