1. Institute of Organic and Biomolecular Chemistry, University of Göttingen, Göttingen, Germany
2. Chemistry of Natural Compounds Department, Pharmaceutical Industries Research Division, National Research Centre, Dokki-Cairo, Egypt
3. Faculty of Pharmacy, Pharmacognosy Department, Cairo University, Cairo, Egypt
4. Red Sea Marine Parks, Hurghada, Egypt
5. Faculty of Science, Chemistry Department, Al-Azhar University, Nasr City-Cairo, Egypt
6. Lorraine University, SRSMC, Boulevard Arago, France