“…1,2 It is distributed mainly in the southwest of China and some others Asian countries, such as Myanmar, Vietnam, Thailand, Nepal, and India. 3,4 Previous chemical investigations of its stems led to the isolation of phenanthrenes, 5,6 bibenzyls, 7,8 diosgenin derivatives, 9 anthraquinones, 5,6 coumarins 6 and so on. In addition, bioactivity studies on pure components have been reported to possess multiple positive effects in vitro experiments, including anti-tumor, anti-mutagenic, antiinflammatory and antioxidant effects.…”