1. Department of Pharmacology, Toxicology and Clinical Pharmacy, German University in Cairo, New Cairo, Egypt
2. Department of Chemistry, Faculty of Science, Cairo University, Gamma Street, Giza, Cairo 12613, Egypt
3. Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
4. Department of Biotechnology, Faculty of Science, Cairo University, Gamma Street, Giza, Cairo 12613, Egypt