1. Institute of Pharmaceutical Chemistry, Goethe University, 60438 Frankfurt, Germany
2. German Cancer Consortium (DKTK), 60590 Frankfurt, Germany
3. German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
4. BASF SE, 67056 Ludwigshafen, Germany
5. Institute of Biochemistry, Goethe University, 60438 Frankfurt, Germany