1. Faculty of Chemistry and Pharmacy, Institute of Pharmacy, University of Regensburg, D-93040 Regensburg, Germany; Research Unit Molecular Cell Biology, Medical Faculty, Friedrich Schiller University, D-07747 Jena, Germany; Department of Cancer Research, ASTA Medica AG, D-60314 Frankfurt/Main, Germany; Tumor Biology Center, Institute of Molecular Medicine, 79106 Freiburg, Germany; Institute of Medicinal Chemistry and Biochemistry, University of Innsbruck, A 6020 Innsbruck, Austria; and Pharmaceutical...