1. Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) Key Laboratory of the Assembly and Application of Organic Functional molecules of Hunan Province College of Chemistry and Chemical Engineering Hunan Normal University Changsha 410081 P. R. China
2. Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University Nishikyo-ku Kyoto 615-8510 Japan
3. Department of Molecular Engineering Graduate School of Engineering Kyoto University Nishikyo-ku Kyoto 615-8510 Japan
4. Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan