1. Institute for Organic Chemistry and Chemical Biology Center for Biomolecular Magnetic Resonance (BMRZ) Goethe University Frankfurt Max-von-Laue-Straße 7 60438 Frankfurt am Main Germany
2. German Cancer Research Center and German Cancer Consortium Im Neuenheimer Feld 280 69120 Heidelberg Germany
3. Department of Medicine 2 Hematology/Oncology University Hospital Frankfurt Goethe University Theodor-Stern-Kai 7 60596 Frankfurt am Main Germany
4. Frankfurt Cancer Institute (FCI) Theodor-Stern-Kai 7 60596 Frankfurt am Main Germany