1. Institute of Organic Chemistry and Biochemistry, of the Czech Academy of Sciences Flemingovo nám. 2 166 10 Prague 6 Czech Republic
2. Department of Organic Chemistry, Faculty of ScienceCharles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
3. F2 Chemicals Ltd. Lea Lane, Lea Town Preston PR4 0RZ UK