1. Institute of Pharmacy, Friedrich Schiller University, Winzerlaer Strasse 2, 07745 Jena, Germany
2. Pharmaceutical Microbiology, Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute, Beutenbergstrasse 11a, 07745 Jena, Germany
3. Institute of Organic and Analytical Chemistry, University of Bremen, Leobener Straße 7, 28359 Bremen, Germany