1. Department of Drug Design and Optimization; Helmholtz Institute for Pharmaceutical Research Saarland (HIPS); Helmholtz Centre for Infection Research (HZI); Campus Building E8.1 66123 Saarbrücken Germany
2. Stratingh Institute for Chemistry; Helmholtz Centre for Infection Research (HZI); University of Groningen; Nijenborgh 7 9747 AG Groningen The Netherlands
3. Department of Pharmacy; Medicinal Chemistry; Saarland University; Campus Building E8.1 66123 Saarbrücken Germany