1. Dipartimento
di Scienze Biomediche
e Biotecnologie, Università di Brescia, 25123 Brescia, Italy
2. Department of Chemistry and
Biochemistry, Medical University-Pleven, 1 St. Kliment Ohridski Street, 5800 Pleven, Bulgaria
3. Department of Chemistry, University of Nevada, Reno, Nevada 89557-0020, United
States