1. Experimental Research Center; China Academy of Chinese Medical Sciences; Beijing 100700 P.R. China
2. College of Chemistry and Chemical Engineering; Xinjiang University; Urumqi 830046 P.R. China
3. Institute of Medicinal Plant Development; Chinese Academy of Medical Science; Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine (Peking Union Medical College), Ministry of Education; Beijing 100193 P.R. China