1. Department of Natural Products in Organismic Interactions, Max Planck Institute for Terrestrial Microbiology, 35043 Marburg, Germany
2. Molecular Biotechnology, Department of Biosciences, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
3. Chemical Biology, Department of Chemistry, Philipps University Marburg, 35043 Marburg, Germany
4. Senckenberg Gesellschaft für Naturforschung, 60325 Frankfurt am Main, Germany