1. Faculty of Pharmacy, Istanbul University, 34116, Beyazit-Istanbul, Turkey, TUBITAK, Marmara Research Center, Materials and Chemical Technologies Research Institute, P.O. Box 21, 41470, Gebze-Kocaeli, Turkey, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, and Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061