1. Pharmacology and Toxicology Research Center
2. Institute of Medicinal Plant Development
3. Chinese Academy of Medical Sciences
4. Peking Union Medical College
5. Beijing 100193
6. State Key Laboratory of Natural and Biomimetic Drugs
7. Peking University
8. Beijing 100191
9. P. R. China
10. Institute für Pharmazeutische Biologie und Biotechnologie
11. Heinrich-Heine-Universität Düsseldorf
12. 40225 Düsseldorf
13. Germany