1 Department of Chemistry, University of Waterloo , Ontario, Canada N2L 3G1.
2 Department of Chemistry, Middle East Technical University , Ankara 06800, Turkey.
3 Department of Pharmacodynamics and Molecular Pharmacology, Faculty of Pharmacy, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń , 85-067 Bydgoszcz, Poland.