B. Kosjek1, W. Stampfer1, S.M. Glueck1, M. Pogorevc1, U. Ellmer1, S.R. Wallner1, M.F. Koegl1, T.M. Poessl1, S.F. Mayer1, B. Ueberbacher1, K. Faber1, W. Kroutil1
1Department of Chemistry, Organic and Bioorganic Chemistry, University of Graz, Heinrichstrasse 28, Graz A-8010, Austria