1. Department of Chemistry, University College London, 20 Gordon Street, London
WC1H 0AJ, U.K.
2. Institute
of Pharmacy, University of Innsbruck, Innrain
52c, 6020 Innsbruck,
Austria
3. Strathclyde Institute
of Pharmacy
and Biomedical Sciences, University of Strathclyde, 27 Taylor Street, Glasgow G4 0NR, U.K.