1. Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
2. Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
3. Institute of Inorganic Chemistry of the Czech Academy of Science, Husinec-Řež 250 68, Czech Republic
4. Faculty of Environment, Jan Evangelista Purkyně University, Pasteurova 3632/15, Ústí nad Labem 400 96, Czech Republic
5. Institute of Catalysis, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
6. Faculty of Natural Sciences, University of Jan Evangelista Purkyně, Pasteurova 3632/16, Ústí nad Labem 400 96, Czech Republic