1. Departament de Quı́mica, Edifici
C, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
2. Department of Pharmaceutical Sciences, University of Padova, 35131 Padova,
Italy
3. X-ray Diffraction Service, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
4. Istituto Oncologico Veneto IRCCS, 35128 Padova, Italy