1. CNR-Institute of Biomolecular Chemistry, Via P. Gaifami 18, 95126 Catania, Italy
2. International PhD School of Chemical Sciences, University of Catania, V.le A. Doria 6, 95125 Catania, Italy
3. CNR-Institute of Crystallography, Via P. Gaifami 18, 95126 Catania, Italy
4. Department of Drug Sciences and Health, University of Catania, V.le A. Doria 6, 95125 Catania, Italy