1. a Department of Chemistry, Biochemistry Subdivision, Hacettepe University, Ankara, Turkey
2. b Department of Chemistry, Biochemistry Subdivision, Hacettepe University, Ankara, Turkey
3. c Department of Chemistry, Dicle University, Diyarbakir, Turkey
4. d Department of Chemistry, Anadolu University, Eskişehir, Turkey
5. e Department of Chemistry, Biochemistry Subdivision, Hacettepe University, Ankara, Turkey