1. Department of Natural Products Chemistry
2. School of Pharmacy
3. Fudan University
4. Shanghai 201203
5. PR China
6. State Key Laboratory of Drug Research
7. Shanghai Institute of Materia Medica
8. Chinese Academy of Sciences
9. Institute of Bioengineering and Nanotechnology
10. Singapore
11. Department of Chemistry
12. University of Pennsylvania
13. Philadelphia
14. USA