1. Department of Biology, Faculty of Science, Albaha University , Al-Baha , Saudi Arabia
2. Department of Chemistry, Faculty of Science, Albaha University , Al-Baha , Saudi Arabia
3. Department of Botany, Faculty of Science, University of Khartoum , Khartoum , Sudan
4. Medicinal and Aromatic Plants Research Institute, National Center for Research , Khartoum , Sudan
5. Pharmacology Department, Faculty of Medicine, Albaha University , Al-Baha , Saudi Arabia
6. Pharmacology Department, Faculty of Pharmacy, Omdurman Islamic University , Khartoum , Sudan