1. a Xinjiang Key Laboratory of Plant Resources and Natural Products Chemistry , Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Urumqi, China
2. b School of Life Science, Shihezi University , Shihezi, China
3. c Graduate University of the Chinese Academy of Sciences , Beijing, China
4. d Bioseparation Technology Laboratory, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health , Bethesda, Maryland, USA