CYCASIN is carcinogenic, to oral feeding rats can produce liver and kidney, its main ingredients are carcinogenic poison DAIDZEIN cycads. However, the subcutaneous injection of goods and another anti-mouse Ehrlich ascites carcinoma and this effect with mitomycin C, similar to oxygen nitrogen mustard. With the performance of the administration of the dual nature of both carcinogenic effect has anti-tumor effects. The pair of cold-blooded goods toxicity. The mice did not have to immediately poisoning, but by 12 ~ 18 h then see dyspnea, respiratory paralysis finally died.