1. Department of Pharmaceutical Analysis
2. School of Pharmacy
3. Second Military Medical University
4. Shanghai 200433
5. China
6. Shanghai Zhabei Institute for Food and Drug Control
7. Shanghai 200436
8. Laboratory of Metabolism
9. Center for Cancer Research
10. National Cancer Institute
11. National Institutes of Health
12. Bethesda
13. Fudan University
14. Shanghai 201203