pale yellow or white powder, hplc detection, content over 20%. the main functions: antibacterial anti-virus, anti-tumor, anti - hepatitis, inhibiting platelet aggregation and thromboxane b2 production. it can prevent the oxidation of low-density lipoprotein, is a potential prevention and treatment of cardiovascular diseases, anti-cancer, anti-viral and immune regulation, and its role mainly for its antioxidant properties.