1. Laboratory of Growth Regulators, Institute of Experimental Botany of the Czech Academy of Sciences, and Faculty of Science, Palacky University, Šlechtitelů 27, Olomouc CZ-78371, Czech Republic
2. Department of Chemical Biology, Faculty of Science, Palacky University, Šlechtitelů 27, Olomouc CZ-78371, Czech Republic
3. Department of Organic Chemistry, Faculty of Science, Palacky University, tř. 17. listopadu 1192/12, Olomouc CZ-771 46, Czech Republic
4. Eenheid Algemene Chemie (ALGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium