1. Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, D-06120, Halle, Saale, Germany
2. Institute of Biochemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Str. 3, D-06120, Halle, Saale, Germany
3. Department of Chemistry, University Cologne, Greinstr. 4, D-50939, Köln, Germany