1. Department of Chemical Sciences, University of Naples Federico II, Naples 80138, Italy
2. Magnetic Resonance Centre (CERM), CIRMMP, and Department of Chemistry “Ugo Schiff”, University of Florence, Sesto Fiorentino 50019, Italy
3. IECB Institut Européen de Chimie et Biologie, Pessac 33600, France
4. Giotto Biotech s.r.l., Sesto Fiorentino 50019, Italy
5. Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
6. Department of Chemistry, University of California, Davis, Davis, California 95616, United States
7. Graduate School of Science, Osaka University, Osaka 565-0871, Japan
8. Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2R3, Canada
9. Department of Medical Microbiology and Immunology, University of Alberta, Edmonton, Alberta T6G 2R3, Canada
10. San Francisco Veterans Affairs Medical Center and University of California, San Francisco, California 94121, United States