1. Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ataturk University, Erzurum, Turkey,
2. Division of Pharmacology, Meikai University School of Dentistry, Sakado, Saitama, Japan,
3. Ataturk University, Faculty of Science, Department of Chemistry, Erzurum, Turkey,
4. College of Science, Department of Zoology, King Saud University, Riyadh, Saudi Arabia, and
5. Neurofarba Department and Laboratorio di Chimica Bioinorganica, Università degli Studi di Firenze, Sesto Fiorentino, Italy