1. Chemistry Department, Faculty of Science; University of Prince Edward Island; Charlottetown, Prince Edward Island C1 A 4P Canada
2. Chemistry Department, Faculty of Science; Taibah University; 30002 Al-Madinah Al-Munawarah Saudi Arabia
3. Pharmacognosy and Pharmaceutical Chemistry Department, Pharmacy College; Taibah University; Al-Madinah Al-Munawarah Saudi Arabia