1. Institute of Medicinal and Pharmaceutical Chemistry; TU Braunschweig; Braunschweig Germany
2. Department of Pharmaceutical Chemistry, College of pharmacy; Jazan University; Jazan Saudi Arabia
3. Chemistry Department, Faculty of Science; King Abdulaziz University; Jeddah Saudi Arabia
4. Chemistry Department, Faculty of Science; University of Jeddah; Jeddah Saudi Arabia
5. Chemistry Department, Faculty of Science; Assiut University; Assiut Egypt