1. School of Pharmacy; Medicinal Chemistry Unit; University of Camerino; via S. Agostino 1 62032 Camerino Italy
2. Medicinal Chemistry Section; Molecular Targets and Medications Discovery Branch; National Institute on Drug Abuse; Intramural Research Program; 333 Cassell Drive Baltimore MD 21224 USA
3. Integrative Neurobiology Section; Molecular Targets and Medications Discovery Branch; National Institute on Drug Abuse; Intramural Research Program; 333 Cassell Drive Baltimore MD 21224 USA
4. Department of Chemistry & Biochemistry; Department of Biomedical & Translational Sciences; College of Science and Mathematics; Rowan University; 201 Mullica Hill Road Glassboro NJ 08028 USA