1. Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Pharmaceutical Sciences, Jiangnan University, Wuxi, P.R. China
2. College of Chemistry and Chemical Engineering, Hunan University, Changsha, P.R. China
3. Department of Chemistry, University of Massachusetts Lowell, Lowell, MA, USA
4. Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden