1. University of Sassari; Department of Chemistry and Pharmacy via F. Muroni, 23/b; 07100 Sassari Italy
2. University of Cairo; Faculty of Science, Department of Botany; Egypt
3. Consiglio per la Ricerca e la sperimentazione in Agricoltura, CRA-NUT; via Ardeatina, 546 00178 Roma Italy
4. University of Salerno; Department of Pharmacy; via Giovanni Paolo II 84084 Fisciano Sa Italy
5. Consiglio per la Ricerca e la sperimentazione in Agricoltura, CRA-CIN; via di Corticella, 133 40128 Bologna Italy