1. Neurosciences CEDD, GlaxoSmithKline, Medicines Research Centre, Via A. Fleming 4, 37135 Verona, Italy
2. Dipartimento Farmaco Chimico Tecnologico, Universitá degli Studi di Siena, Via Aldo Moro 2, I-53100 Siena, Italy
3. GlaxoSmithKline, New Frontiers Science Park, Third Avenue, Harlow, Essex, CM19 5AW, U.K.
4. Integrated Research Unit, IRU Chemistry, Prilaz Baruna Filipovica 29, 10000 Zagreb, Croatia