1. Department of Organic Chemistry; University of Pannonia; Egyetem u. 10 H-8200 Veszprém Hungary
2. NMR Laboratory; University of Pannonia; Egyetem u. 10 H-8200 Veszprém Hungary
3. Department of Pharmaceutical Chemistry; University of Debrecen; Egyetem tér 1 H-4032 Debrecen Hungary
4. Institute of Materials and Environmental Chemistry; Hungarian Academy of Sciences; Magyar tudósok krt. 2 H-1117 Budapest Hungary
5. Department of General and Inorganic Chemistry; University of Pannonia; Egyetem u. 10 H-8200 Veszprém Hungary
6. Laboratory of Drug Substance Analytical Development 1; Egis Pharmaceuticals PLC; H-1106 Budapest Keresztúri út 30-38 Hungary