1. Department of Organic Chemistry; Wrocław University of Technology, Wyspianskiego 27, Wrocław; 50-370 Poland
2. Department of Inorganic Chemistry; Wroclaw Medical University, Borowska 211 A; 50-556 Wroclaw Poland
3. Institute of Immunology and Experimental Therapy; Polish Academy of Sciences, Weigla 12; 53-114 Wroclaw Poland