1. Department of Biomolecular Chemistry; Leibniz Institute for Natural Product Research and Infection Biology; Hans Knöll Institute; Adolf-Reichwein-Strasse 23 07745 Jena Germany
2. Chair of Pharmaceutical and Medicinal Chemistry; Institute of Pharmacy; Friedrich-Schiller-Universität Jena; Philosophenweg 14 07743 Jena Germany
3. Department of Biochemical and Chemical Engineering; Technische Universität Dortmund; Emil-Figge-Strasse 66 44227 Dortmund Germany