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. c Graduate University of the Chinese Academy of Sciences , Beijing, P. R. China
3. d Union Laboratories of Bioactive Ingredients of Edible Plants from Central Asia , Urumqi, P. R. China
4. b Bioseparation Technology Laboratory, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health , Bethesda, Maryland, USA