1. Institute of Biotechnology, Academy of Sciences of the Czech Republic, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
2. Institute
of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i., Flemingovo n. 2, 166 10 Prague 6, Czech Republic
3. Department of Chemistry, McDaniel College, 2
College Hill, Westminster, Maryland 21157, United States