1. Department of Organic and Applied Chemistry; University of Łódź; Tamka 12 91-403 Łódź Poland
2. Chemistry Department “Ugo Schiff”; University of Florence; Via della Lastruccia 3-13 50019 Sesto Fiorentino Italy
3. Department of Chemistry; University of Zurich; Winterthurerstrasse 190 8057 Zurich Switzerland