1. C.S.G.I. - Department of Chemistry,
Physical-Chemistry Section, University of Pavia, Viale Taramelli 16, 27100 Pavia, Italy
2. Department of Drug Sciences, University of Pavia, Viale Taramelli 12, 27100 Pavia,
Italy
3. Department of Chemistry,
Organic
Chemistry Section, University of Pavia,
Viale Taramelli 10, 27100 Pavia, Italy