1. State Key Laboratory of Bioactive Substance and Function of Natural Medicines
2. and Beijing Key Laboratory of Active Substance Discovery and Drugability Evaluation
3. Institute of Materia Medica
4. Peking Union Medical College and Chinese Academy of Medical Sciences
5. Beijing 100050
6. School of Pharmaceutical Sciences
7. Taishan Medical University
8. Taian 271016
9. P R China