1. Department of Chemical Sciences University of Napoli “Federico II,” Via Cintia, 46, Napoli 80126 Italy
2. Department of Pharmaceutical Chemistry and the Cardiovascular Research Institute University of California at San Francisco San Francisco California
3. Department of Chemistry University of Pennsylvania 209 South 33rd Street, Philadelphia Pennsylvania
4. Institute of Biostructure and Bioimaging, National Research Council via Mezzocannone, 16, Napoli 80134 Italy