1. ElexoPharm GmbH, Im Stadtwald, Building A1.2, 66123 Saarbrücken, Germany
2. Chemistry of Natural and Microbial Products Department, National Research Centre, Dokki, 12622 Cairo, Egypt
3. PharmBioTec GmbH, 66123 Saarbrücken, Germany
4. Department of Pharmaceutical and Medicinal Chemistry, Saarland University, 66123 Saarbrücken, Germany
5. Institute of Pharmaceutical Chemistry, Philipps-University, 35032 Marburg, Germany
6. Department of Drug Design and Optimization, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), 66123 Saarbrücken, Germany