1. Department of Drug Sciences, University of Catania, viale A. Doria 6, 95125 Catania, Italy
2. Department of Drug Sciences, Section of Biochemistry, University of Catania, viale A. Doria 6, 95125 Catania, Italy
3. Department of Drug Sciences, Section of Medicinal Chemistry, University of Catania, viale A. Doria 6, 95125 Catania, Italy