1. Institute of Pharmaceutical Biology and Biotechnology
2. Heinrich-Heine-Universität Düsseldorf
3. 40225 Düsseldorf
4. Germany
5. Department of Pharmacognosy
6. Department of Organic Chemistry
7. University of Debrecen
8. Debrecen 4032
9. Hungary
10. Institute of Physiological Chemistry
11. Universitätsmedizin der Johannes Gutenberg-Universität Mainz
12. 55128 Mainz
13. Faculty of Pharmacy
14. Ain-Shams University
15. Cairo 11566
16. Egypt
17. State Key Laboratory of Natural and Biomimetic Drugs
18. Peking University
19. Beijing 100191
20. P. R. China