1. Department of Pharmacy Pharmaceutical Biotechnology University of Saarland Campus, Bld. C2 3 Saarbrucken 66123 Germany
2. Department of Pharmacy Pharmaceutical Biology University of Saarland Campus, Bld. C2 3 Saarbrucken 66123 Germany
3. Department Microbial Natural Products Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) Campus, Bld. 8 1 Saarbrucken 66123 Germany
4. Department of Chemistry and Pharmacy Friedrich-Alexander-Universität Erlangen-Nürnberg Nikolaus-Fiebiger-Strasse 10 91058 Erlangen Germany
5. Center for Biotechnology—CeBiTec University of Bielefeld Universitätsstraße 25 33615 Bielefeld Germany