1. Institute of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Beethovenstr. 55, Braunschweig D-38106, Germany
2. Auckland Cancer Society Research Centre, University of Auckland, Auckland 1023, New Zealand
3. Bio21 Institute and Department of Biochemistry and Molecular Biology, The University of Melbourne, Melbourne 3052, VIC, Australia
4. Inorganic Chemistry I−Bioinorganic Chemistry, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitaetsstrasse, Bochum 44801, Germany