Preparative Isolation and Purification of Three Stilbene Glycosides from the Tibetan Medicinal Plant Rheum tanguticum Maxim. Ex Balf. by High‐speed Counter‐current Chromatography
1. Northwest Institute of Plateau Biology, Chinese Academy of Sciences, , Xining 810001, China;2. Graduate University of the Chinese Academy of Sciences, , Beijing, 100049 China