1. Department of Chemistry; Memorial University of Newfoundland; St. John's, Newfoundland and Labrador Canada A1B3X7
2. Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy; Misr University for Science &Technology, Al-Motamayez District; 6th of October City P.O. Box 77 Egypt
3. Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy; Beni-Suef University; Beni-Suef Egypt
4. Pharmaceutical Sciences Department; Ibn Sina National College for Medical Studies; Jeddah 21418 Saudi Arabia.
5. Department of Pharmaceutical Chemistry, College of Pharmacy; Jouf University; Sakaka, Aljouf Saudi Arabia
6. Department of Chemistry and Biochemistry; Wilfird Laurier University; Waterloo, ON Canada N2 L3C5