1. Chemistry Department, College of Science, King Saud University, Riyadh, Saudi Arabia;
2. Biochemistry Department, College of Science, King Saud University, Riyadh, Saudi Arabia;
3. Faculty of Pharmacy, Ain Shams University, Cairo, Egypt;
4. Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia;
5. Department of Chemistry, Kulliyyah of Pharmacy, International Islamic University Malaysia, Kuantan, Malaysia;
6. Department of Pharmaceutical Chemistry, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia;
7. Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Helwan University, Cairo, Egypt