1. Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy, Department of Pharmaceutical Sciences, University of Padova, via Marzolo 5, 35131 Padova, Italy, Department of Chemistry, University of Siena, via A. Moro, 53100 Siena, Italy, and Department of Environmental Medicine and Public Health, University of Padova, via Giustiniani 2, 35128 Padova, Italy