1. Department of Chemical and Pharmaceutical Sciences, University of Trieste, P.le Europa 1, 34127, Trieste, Italy
2. Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, U.K.
3. CAPES Foundation, Ministry of Education of Brazil, Brasilia - DF 70040-020, Brazil
4. Leicester School of Pharmacy, De Montfort University, the Gateway, Leicester, LE1 9BH, U.K.