1. Department of Microbial Natural Products (MINS), Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI) and Department of Pharmacy at Saarland University (UdS), Campus E8.1, 66123 Saarbrücken, Germany
2. Department of Pharmacy, Pharmaceutical Biotechnology, Saarland University, 66123 Saarbrücken, Germany
3. German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany
4. Workgroup Structural Biology of Biosynthetic Enzymes, HIPS, HZI, UdS, 66123 Saarbrücken, Germany
5. School of Chemistry, University of Glasgow, Glasgow G12 8QQ, United Kingdom