1. Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ataturk University, Erzurum, Turkey;
2. School of Dentistry, Meikai University Research Institute of Odontology (M-RIO), Meikai University, Sakado, Japan;
3. Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Anadolu University, Eskisehir, Turkey;
4. Department of Chemistry, Faculty of Science, Ataturk University, Erzurum, Turkey;
5. Neurofarba Department, University Firenze, Florence, Italy