1. Northern Institute for Cancer Research, School of Natural Sciences - Chemistry, Bedson Building, Newcastle upon Tyne NE1 7RU, U.K., KuDOS Pharmaceuticals Ltd., 327 Cambridge Science Park, Milton Road, Cambridge CB4 4WG, U.K., Northern Institute for Cancer Research, Medical School, Paul O'Gorman Building, Framlington Place, University of Newcastle upon Tyne, NE2 4HH, U.K., and KuDOS Horsham Ltd., Foundry Lane, Horsham, West Sussex RH13 5PX, U.K.