1. Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Assiut Branch, Assiut, 71524, Egypt
2. Natural and Medical Sciences Research Center, University of Nizwa, Birket Almawz, P. O. box 33, Oman
3. Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Port Said University, Port Said 42511, Egypt
4. Institute of Medicinal and Pharmaceutical Chemistry, Technische Universitaet Braunschweig, 38106 12 Braunschweig, Germany