1. a State Key Laboratory of Natural and Biomimetic Drugs , Peking University , Beijing, 100083, China
2. b Department of Biological Sciences and Biotechnology , Tsinghua University , Beijing, 100084, China
3. c Leibniz-Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute , Beutenbergstraße 11a, 07745, Jena, Germany
4. d Analytical and testing Center, Beijing Normal University , Beijing, 100875, China