1. Molekulare Biotechnologie, Goethe Universität Frankfurt, Max-von-Laue-Str. 9, Frankfurt am Main 60438, Germany
2. Department of Natural Products in Organismic Interactions, Max-Planck-Institute for Terrestrial Microbiology, Marburg 35043, Germany
3. Senckenberg Gesellschaft für Naturforschung, Frankfurt am Main 60325, Germany