1. Department of Pharmacy, Faculty of Medicine, University of Niš, Dr Zoran Đinđić Boulevard 81, 18000 Niš, Serbia
2. Department of Pharmaceutical Research and Development, Institute for Medicinal Plant Research "Dr Josif Pančić", Tadeuša Košćuška 1, 11 000 Belgrade, Serbia
3. Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000 Niš, Serbia