1. Gedeon Richter Plc, 19-21 Gyömrői
út, Budapest, 1103 Hungary
2. Institute
of Chemistry, Saint Petersburg State University, 26 Universitetskii Prospekt, Peterhof, 198504 Russia
3. Medicinal
Chemistry Research Group, Research Centre for Natural Sciences, Hungarian Academy of Sciences, 2 Magyar tudósok körútja, Budapest, 1117 Hungary