1. Directorate of Drug Substance Development, Egis Pharmaceuticals Plc., P.O. Box 100, H-1475 Budapest, Hungary
2. Medicinal Chemistry Research Group, Research Centre for Natural Sciences, P.O. Box 286, H-1519 Budapest, Hungary
3. Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szent Gellért tér 4, H-1111 Budapest, Hungary