1. School of Science and Technology, Chemistry Division, University of Camerino, Via Madonna delle Carceri (ChIP), 62032 Camerino, Macerata, Italy
2. Department of Chemistry and Biochemistry, The University of Texas at Arlington, Box 19065, Arlington, Texas 76019-0065, USA
3. Department of Pharmaceutical and Pharmacological Sciences, University of Padova, via Marzolo 5, 35131 Padova, Italy