1. Department of Drug Delivery, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), 66123 Saarbrücken, Germany
2. Department of Pharmacy, Saarland University, 66123 Saarbrücken, Germany
3. Center for Molecular Signaling, Saarland University, Kirrbergerstr./Geb. 46, 66421 Homburg, Germany
4. Department of Drug Design and Optimization (DDOP), Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), 66123 Saarbrücken, Germany
5. Department of Microbial Natural Products (MINS), Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), 66123 Saarbrücken, Germany