1. Department of Analytical Chemistry, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic
2. Department of Optics, Palacký University Olomouc, Olomouc, 771 46, Czech Republic
3. Forensic Laboratory of Biologically Active Substances, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic
4. Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic
5. National Institute of Mental Health, Klecany 250 67, Czech Republic
6. Department of Organic Chemistry, University of Chemistry and Technology, Prague 6, 166 28, Czech Republic