1. Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic; Flemingovo nám. 2; 166 10 Prague 6; Czech Republic
2. Institute of Chemical Technology Prague; Faculty of Food and Biochemical Technology; Technická 5; 166 28 Prague 6; Czech Republic
3. Institute of Physiology, Academy of Sciences of the Czech Republic; Vídeňská 1083; 142 20 Prague 4; Czech Republic