1. The Czech Academy of SciencesInstitute of Biophysics Královopolská 135 612 65 Brno Czech Republic
2. Institute of Organic Chemistry and BiochemistryCzech Academy of Sciences Flemingovo náměstí 2 16610 Prague 6 Czech Republic
3. Department of Organic ChemistryFaculty of ScienceCharles University in Prague Hlavova 8 Prague-2 12843 Czech Republic
4. Central European Institute of TechnologyMasaryk University Kamenice 753/5 625 00 Brno Czech Republic