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