1. Department of Chemistry, University of Minnesota, Minneapolis, MN 55455, USA
2. Department of Experimental Biology, Faculty of Science, Palacký University, CZ-78371, Czech Republic
3. Department of Medicinal Chemistry, University of Minnesota, Minneapolis, MN 55455, USA
4. Department of Experimental and Clinical Pharmacology, University of Minnesota, Minneapolis, MN, 55455, USA
5. Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Łódź, Poland