1. Preclinical Development, GlaxoSmithKline plc., P.O. Box 1539, King of Prussia, Pennsylvania 19406
2. Molecular Discovery Research, GlaxoSmithKline plc., New Frontiers Science Park, Third Avenue, Harlow, Essex CM19 5AW, U.K.
3. Preclinical Development, GlaxoSmithKline plc., 5 Moore Drive, Research Triangle Park, North Carolina 27709
4. School of Chemistry, The University of Edinburgh, West Mains Road, Edinburgh, Scotland EH9 3JJ, U.K.
5. Chemistry Department, University of Durham, South Road, Durham DH1 3LE, U.K.