1. Department
of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
2. Pharmaceutical
Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
3. Department
of Chemistry, University of Tartu, Ravila 14a, Tartu 50411, Estonia
4. Department
of Chemistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia