1. Department of Organic Chemistry, Faculty of Science, Charles University, Albertov 6, 128 43 Praha 2, Czech Republic
2. Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Praha 6, Czech Republic
3. Department of Inorganic Chemistry, Faculty of Science, Charles University, Albertov 6, 128 43 Praha 2, Czech Republic