1. The Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, 500 05 Hradec Králové, Czech Republic
2. The Department of Chemistry, Faculty of Science, The University of South Bohemia in České Budějovice, Branišovská 1760, 37005 České Budějovice, Czech Republic
3. The Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic