1. Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine
2. Ministry of Education
3. Institute of Medicinal Plant Development
4. Peking Union Medical College and Chinese Academy of Medical Sciences
5. Beijing 100193
6. State Key Laboratory of Applied Organic Chemistry
7. College of Chemistry and Chemical Engineering
8. Lanzhou University
9. Lanzhou 730000
10. People's Republic of China
11. College of Pharmaceutical Science
12. Key Laboratory of Pharmaceutical Quality Control of Hebei Province
13. Hebei University
14. Baoding 071002