1. Faculty
of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Straße 4a, D-44227 Dortmund, Germany
2. Department
of Medical Oncology, Sarcoma Centre West German Cancer Centre University Duisburg−Essen, Medical School, Hufelandstraße 55, D-45122 Essen, Germany
3. Germany
and German Cancer Consortium (DKTK), Partner Site University Hospital Essen, D-45147 Essen, Germany
4. Taros Chemicals GmbH & Co. KG, Emil-Figge-Straße 76a, D-44227 Dortmund, Germany