1. Istituto Pasteur—Fondazione Cenci Bolognetti, Department of Biochemical Sciences, “A. Rossi Fanelli”, University of Rome “La Sapienza”, I-00185 Rome, Italy
2. Department of Pharmaceutical and Toxicological Chemistry, University of Naples “Federico II”, Via D. Montesano 49, I-80131 Naples, Italy
3. Department of Pharmaceutical Science, University of Salerno, I-84084 Fisciano, Salerno, Italy