1. Institute of Molecular and Translation Medicine; Hněvotínská 5 Olomouc 779 00 Czech Republic
2. Department of Organic Chemistry and Biochemistry; University of Notre Dame; Notre Dame IN 46556 USA
3. Chemistry Department; Kalamazoo College; 1200 Academy St. Kalamazoo MI 49006 USA
4. Department of Organic Chemistry; Palacký University; 17. listopadu 12 771 46 Olomouc Czech Republic