1. GlaxoSmithKline Research & Development, Five Moore Drive, Research Triangle Park, North Carolina 27709, United States
2. GlaxoSmithKline
Medicines Research Centre, Gunnels
Wood Road, Stevenage, Hertfordshire, SG1 2NY, United Kingdom
3. Department
of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States