1. Department of Chemistry; University of Pavia; Viale Taramelli 10 27100 Pavia Italy
2. IRCCS MultiMedica; via Fantoli 16/15 20138 Milano Italy
3. Istituto di Chimica del Riconoscimento Molecolare; CNR; Via Mario Bianco 9 20131 Milano Italy
4. Department of Pharmacy; University of Salerno; Via Giovanni Paolo II, 132 84084 Fisciano Italy
5. Institut für Organische und Biomolekulare Chemie; Georg-August-Universität Göttingen; Tammannstraße 2 37077 Göttingen Germany