1. Institute of Chemistry and Faculty of Natural Sciences, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia
2. Department of Organic Chemistry and Faculty of Natural Sciences, Comenius University, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia
3. Central Laboratories, Faculty of Chemical Technology, Slovak University of Technology, Radlinského 9,
SK-812 37 Bratislava, Slovakia