1. Department of Inorganic and Analytical Chemistry; NMR Group, Budapest University of Technology and Economics; Szt. Gellért Sq. 4 H-1111 Budapest Hungary
2. Institute of Pharmacognosy, Faculty of Pharmacy; University of Szeged; Eötvös utca 6 H-6720 Szeged Hungary
3. Department of Medical Chemistry; University of Szeged; Dóm Sq. 8 H-6720 Szeged Hungary