1. Centre of Region Haná for Biotechnological and Agricultural Research, Central Laboratories and Research Support, Faculty of Science; Palacky University; Olomouc Czech Republic
2. Department of Genetic Resources for Vegetables; Medicinal and Special Plants, Crop Research Institute; Olomouc Czech Republic
3. Department of Organic Chemistry, Institute for Molecules and Materials; Radboud University Nijmegen; Nijmegen The Netherlands