1. Solid-State Research Group,
Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow,
G4 0RE, U.K.
2. Department
of Chemistry, University College London, 20 Gordon Street, London
WC1H 0AJ, U.K.
3. Eli Lilly and Company, Indianapolis, Indiana 46285,
United States