1. Institute of Organic and Biomolecular Chemistry Georg-August-University Göttingen Tammannstrasse 2 37077 Göttingen Germany
2. Center for Biostructural Imaging of Neurodegeneration (cfBIN) University Medical Center Göttingen von-Sieboldstrasse 3a 37075 Göttingen Germany
3. Institute of Physical Chemistry Georg-August-University Göttingen Tammannstrasse 6 37077 Göttingen Germany