1. Division of Pharmaceutical Sciences, King’s College London, Franklin-Wilkins-Building, Stamford Street, London SE1 9NH, U.K., Department of Inorganic Chemistry, Georg-August University of Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany, Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, U.K., and Department of Infectious Diseases, King’s College London, Hodgkin-Building, Guy’s Campus, London SE1 1UL, U.K.