1. Department of Pharmaceutical Chemistry
2. College of Pharmacy
3. King Saud University
4. Riyadh 11451
5. Saudi Arabia
6. Department of Tanning Materials and Leather Technology
7. National Research Centre
8. Cairo 12622
9. Egypt
10. Chemistry of Natural Products Group
11. Center of Excellence for Advanced Sciences
12. Medicinal Aromatic, and Poisonous Plants Research Center
13. Riyadh
14. Pharmacognosy Department
15. Drug Exploration and Development Chair (DEDC)