1. Department of Pharmaceutical and Toxicological Chemistry, University of Naples “Federico II”, I-80131 Naples, Italy, Department of Pharmaceutical Science, University of Salerno, I-84084 Fisciano, Salerno, Italy, and Department of Biochemical Science, Cenci Bolognetti Foundation—Pasteur Institute, “A. Rossi Fanelli”, University of Rome “La Sapienza”, I-00185 Rome, Italy