1. Institute of Bioorganic Chemistry, Heinrich Heine University Düsseldorf, Wilhelm-Johnen-Straße, 52428 Jülich, Germany
2. Institute of Bio- and Geosciences (IBG-1): Bioorganic Chemistry, Jülich Research Centre, Wilhelm-Johnen-Straße, 52428 Jülich, Germany
3. Institute of Molecular Medicine I, Medical Faculty and University Hospital Düsseldorf, Heinrich Heine University Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany