1. Manchester Institute of Biotechnology
2. School of Chemistry
3. University of Manchester
4. M17DN Manchester, UK
5. Dipartimento di Chimica e Tecnologie del Farmaco
6. La Sapienza Universita' di Roma
7. 00185 Roma, Italy
8. Laboratoire de Chimie Physique
9. UMR8000 CNRS Faculté des Sciences
10. Université Paris Sud
11. 91405 Orsay Cedex, France