[1] Univ Cagliari, Dipartimento Sci Chim & Geol, SS 554 Bivio Sestu, I-09042 Monserrato, CA, Italy
[2] Univ Seville, Fac Quim, Dept Quim Organ, Apartado 1203, E-41071 Seville, Spain
[3] Univ Cagliari, Dipartimento Sci Biomed, SS 554 Bivio Sestu, I-09042 Monserrato, CA, Italy