1. Dept. of Biomolecular Chemistry Leibniz Institute for Natural, Product Research and Infection Biology HKI Beutenbergstr. 11a 07745 Jena Germany
2. Institute for Organic Chemistry and Macromolecular Chemistry Friedrich Schiller University Jena Humboldtstr. 10 07743 Jena Germany
3. Faculty of Biological Sciences Friedrich Schiller University Jena 07743 Jena Germany