1. Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt
2. Pharmacology Unit, Cancer Biology Department, National Cancer Institute, Cairo University, Cairo, Egypt
3. Department of Chemistry, College of Sciences, University of Sharjah, P. O. 27272, Sharjah, United Arab Emirates
4. Department of Chemistry, Faculty of Science, Suez Canal University, Ismailia, 41522, Egypt