1. Department of Chemistry, Division of Food Chemistry and Toxicology, University of Kaiserslautern, Erwin-Schrödinger-Strasse
52, D-67663 Kaiserslautern, Germany
2. Department of Pharmacy and Molecular Biotechnology,
Division of Pharmaceutical Biology, University of Heidelberg, Im Neuenheimer
Feld 364, D-69120 Heidelberg, Germany