1. Department of Chemistry, School of Life Sciences, University of Sussex, Falmer, Brighton BN1 9QJ, U.K., Cancer Research UK Drug−DNA Interactions Research Group, Department of Oncology, University College London, London W1W 7BS, U.K., Department of Biochemistry, School of Life Sciences, University of Sussex,, Brighton BN1 9QJ, U.K., and Department of Chemistry, Christopher Ingold Laboratories, University College London, 20 Gordon Street, London WC1H OAJ, U.K.