1. Department Pharmaceutical Microbiology at the Hans Knöll Institute; Friedrich-Schiller-Universität; Winzerlaer Strasse 2 07745 Jena Germany
2. Department Biomolecular Chemistry; Leibniz Institute for Natural Product Research and Infection Biology; Beutenbergstrasse 11a 07745 Jena Germany
3. Department of Biochemical and Chemical Engineering; Technical University Dortmund; Emil-Figge-Strasse 66 44227 Dortmund Germany