1. Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology
2. 43007 Tarragona
3. Spain
4. Departament de Química Analítica i Química Orgànica
5. Universitat Rovira i Virgili
6. State Key Laboratory of Natural and Biomimetic Drugs
7. School of Pharmaceutical Sciences
8. Peking University
9. Beijing 100191
10. China
11. Department of Chemistry
12. University of Illinois at Chicago
13. Chicago
14. USA