1. Cancer Drug Research Laboratory, Department of Medicine, Division of Medical Oncology, McGill University Health Center/Royal Victoria Hospital, Montreal, H3A 1A1, Quebec, Canada, Chemical Computing Group Inc., 1010 Sherbrooke Street West, Suite 910, Montreal, H3A 2R7, Québec, Canada, and Drug-DNA Interactions Research Group, Department of Oncology, UCL, Cancer Research UK, 91 Riding House Street, London W1W 7BS, U.K.