1. Medicines Research Centre, GlaxoSmithKline R&D, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, U.K.
2. Department
of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral
Street, Glasgow, G1 1XL, U.K.
3. Les Ulis, Centre de Recherche, GlaxoSmithKline R&D, 25,27 Avenue du Québec, 91140 Villebon sur Yvette, France