1. PharmaCenter Bonn, Pharmaceutical Institute,
Pharmaceutical Chemistry I, University of Bonn, An der Immenburg 4, D-53121 Bonn, Germany
2. Institute of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, D-76131
Karlsruhe, Germany
3. Laboratory of Inorganic
Chemistry, Department of Chemistry, University of Helsinki, P.O. Box 55, A.I.Virtasen Aukio 1, Helsinki FIN-00014, Finland
4. Institute
of Toxicology and Genetics, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen,
Germany