1. 1Imperial Chemical Industries Ltd., Pharmaceuticals Division, Department of Biochemistry, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, U.K.
2. 2Imperial Chemical Industries Ltd., Pharmaceuticals Division, Department of Biochemistry, Mereside, Alderley Park, Macclesfield, Cheshire SK10 4TG, U.K.