1. Department of Chemistry of Natural Products, University of Naples Federico II, Naples, Italy
2. Department of Drug Sciences, Biochemistry Section, University of Catania, Catania, Italy
3. Department of Bio-medical Sciences, University of Catania, Catania, Italy
4. Faculty of Agronomic Sciences, University of Saint Esprit, Kaslik (Beyrouth), Lebanon
5. Department of Pharmaceutical and Biomedical Sciences, University of Salerno, Salerno, Italy
6. Department of Molecular and Biomolecular Science and Technology, Organic Chemistry Section, University of Palermo, Palermo, Italy