1. School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, U.K., School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, U.K., Department of Pharmacy, King’s College London, Franklin-Wilkins Building, 150 Stamford Street, London, SE1 9NN, Defence Science Technology Laboratory (DSTL), Porton Down, Salisbury SP4 0JQ, Wilts, U.K., and ISIS Pulsed Neutron & Muon Source, Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, U.K.