1. CECF, Faculdade de Farmácia, Universidade de Lisboa, Av. Forças Armadas, 1600-083 Lisboa, Portugal, Department of Chemistry, The Open University, Milton Keynes MK7 6AA, U.K., Wolfson Centre for Rational Structure-Based Design of Molecular Diagnostics, School of Pharmacy & Pharmaceutical Sciences, University of Manchester, Manchester M13 9PL, U.K., and EPSRC National Crystallography Service, School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K.