1. State Key Laboratory of Drug Research
2. Shanghai Institute of Materia Medica
3. Chinese Academy of Sciences
4. Shanghai 201203
5. P. R. China
6. Institute of Modern Chinese Medicine
7. College of Pharmaceutical Sciences
8. Zhejiang University
9. Hangzhou 310058
10. Department of Biochemistry and the Virginia Tech Center for Drug Discovery
11. MC 0308
12. Virginia Polytechnic Institute and State University
13. Blacksburg
14. USA