1. Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Kingdom of Saudi Arabia;
2. Department of Pharmacognosy, College of Pharmacy, Omdurman Islamic University, Khartoum, Sudan;
3. Nanomedicine Research Unit, Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Kingdom of Saudi Arabia