1. Department of Organic Chemistry, Faculty of Science; Charles University in Prague, Hlavova 8; 128 43 Prague 2 Czech Republic
2. Department of Biochemistry, Faculty of Science; Charles University in Prague; Hlavova 8 128 43 Prague 2
3. Institute of Organic Chemistry and Biochemistry; Academy of Sciences of the Czech Republic; Flemingovo n.2 166 10 Prague 6 Czech Republic