1. Chemistry Department, University of Bari “Aldo Moro”, Via E. Orabona, 4, I-70125 Bari, Italy
2. CNR − Institute of Crystallography, Via Amendola 122/o, 70126 Bari, Italy
3. Laboratoire de Chémoinformatique UMR7140, 4 rue Blaise Pascal, 67000 Strasbourg, France
4. CNR − Institute of Crystallography, Via Vivaldi 43, 81100 Caserta, Italy