Latin name: Polygonum cuspidatum Chinese name: Hu Zhang Genus: Polygonum Family: Polygonaceae Plant original: Polygonum Cuspidatum Sieb. Part used: Rhizome Specification: Resveratrol 1%--98% Test By HPLC CAS:501-36-0 Molecular weight: 228.24 Mecular formula: C14H12O3 Active ingredient:Trans-Resveratrol Appearance: white fine powder Odour:special