1. Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia;
2. Department of General Studies, Jubail Industrial College, Jubail Industrial City, Saudi Arabia;
3. Department of Chemistry, College of Sciences, Taibah University, Al-Medina, Al-Munawara, Saudi Arabia;
4. Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi, India