1. a Xinjiang Key Laboratory of Plant Resources and Natural Products Chemistry , Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Urumqi, P. R. China
2. d School of Life Science , Shihezi University , Shihezi, P. R. China
3. e Graduate University of the Chinese Academy of Sciences , Beijing, P. R. China
4. b Union Laboratories of Bioactive Ingredients of Edible Plants from Central Asia , Urumqi, P. R. China
5. c Bioseparation Technology Laboratory, Biochemistry and Biophysics Center , National Heart, Lung, and Blood Institute, National Institutes of Health , Bethesda, Maryland, USA