Original plant: Root of Polygonum cuspidatum sieb.et zucc. CAS number: 501-36-0 Assay (by HPLC): 10%--99% Moleclar formula: C14H12O3 Molucular weight: 228.24 Solubility: Soluble in Alcohol, Acetone, Ethyl ether, and so on. Pharmacology: With the pharmacological actions such as antisepsis, oxidation resistance. Protects against heart disease, cancers, platelet aggregation, vessel flaccidity, decreases blood fat and resists mutagenesis, etc.