1. Department of Agriculture and Forestry Science; University of Tuscia; Viterbo Italy
2. Department of Pharmacy and Biotechnology FABIT; University of Bologna; Bologna Italy
3. National Research Council CNR-Istituto di Biologia Agroambientale e Forestale; Porano Terni Italy
4. Carlsberg Research Laboratory; Copenhagen Denmark
5. Department of Chemistry ‘G. Ciamician’; University of Bologna; Bologna Italy