1. School of Pharmaceutical Sciences, Capital Medical University, Beijing 100069, China
2. School of Chemistry and Environment, Yunnan Minzu University, Kunming, Yunnan 650500, China
3. State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs, National Resource Center for Chi-nese Materia Medica, China Academy of Chinese Medical Science, Beijng 100700, China