1. Institute of Organic Chemistry and Biochemistry of the CAS, Flemingovo nám. 542/2, 160 00 Praha 6, Czech Republic
2. Department of Chemistry, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
3. RECETOX, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
4. Institute of Organic Chemistry and Chemical Biology, Goethe University, Max-von-Laue-Str. 7, 60438 Frankfurt am Main, Germany