1. School of Perfume and Aroma Technology Shanghai Institute of Technology Shanghai 201418 P. R. China
2. Department of Chemistry The Scripps Research Institute La Jolla CA 92037 USA
3. Department of Chemistry Fudan University Shanghai 200438 P. R. China
4. School of Chemistry Sun Yat-sen University Guangzhou 510275 P. R. China
5. College of Chemistry and Molecular Engineering Peking University Beijing 100871 P. R. China
6. La Trobe Institute For Molecular Science La Trobe University Melbourne VIC 3086 Australia
7. Department of Molecular Medicine The Scripps Research Institute La Jolla CA 92037 USA