1. Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) Helmholtz Centre for Infection Research (HZI) 38124 Saarbrücken Germany
2. Department of Pharmacy Saarland University, Saarbrücken Campus Campus E8.1 66123 Saarbrücken Germany
3. Leibniz Institute for New Materials (INM) Saarland University Campus D2 2 66123 Saarbrücken Germany
4. Department of Biosciences and Medical Biology Hellbrunner Str. 34 University of Salzburg Salzburg 5020 Austria
5. Department of Pharmacy Pharmaceutical and Medicinal Chemistry Saarland University Campus C2 3 66123 Saarbrücken Germany
6. Chemistry Department Saarland University 66123 Saarbrücken Germany