1. Chemical Biology of Carbohydrates (CBCH) Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) Helmholtz Centre for Infection Research 66123 Saarbrücken Germany
2. Deutsches Zentrum für Infektionsforschung (DZIF) Standort Hannover-Braunschweig 38124 Braunschweig Germany
3. Department of Chemistry Saarland University 66123 Saarbrücken Germany
4. Department of Pharmacy Saarland University 66123 Saarbrücken Germany
5. Microbial Natural Products (MINS) Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) Helmholtz Centre for Infection Research 66123 Saarbrücken Germany
6. Drug Design and Optimisation (DDOP) Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) Helmholtz Centre for Infection Research 66123 Saarbrücken Germany
7. URSAPHARM Arzneimittel GmbH 66129 Saarbrücken Germany
8. Hochschule Kaiserslautern Protein Chemistry Group 66953 Pirmasens Germany