1. Dipartimento di Scienze Chimiche, Università di Camerino, 62032 Camerino, Italy, Dipartimento di Chimica Farmaceutica e Tossicologica, Università di Napoli “Federico II”, 80131 Napoli, Italy, Department of Biochemistry and Molecular Biology, Indiana University School of Medicine and Richard Roudebush VA Medical Center, Indianapolis, Indiana 46202, Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Vienna, 1090 Vienna, Austria