1. Chemistry of Natural and Microbial Products Department, Pharmaceutical and Drug Industries Research Division, National Research Centre, Giza, Egypt
2. Department of Chemistry, Faculty of Science, Cairo University, Cairo, Egypt
3. Department of Chemistry, Faculty of Science (Girls Branch), Al-Azhar University, Cairo, Egypt
4. Department of Chemistry, Faculty of Science, Ain Shams University, Cairo, Egypt
5. Therapeutic Chemistry Department, National Research Centre, Giza, Egypt