1. Shanghai Cancer Center and Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, P.R. China
2. Department of Chemistry, Fudan University, Shanghai 200433, P.R. China
3. Department of General Surgery, Affiliated Hospital of Nantong University, Nantong 226001, P.R. China
4. Key Laboratory of Glycoconjugates Research Ministry of Public Health, Fudan University, Shanghai 200032, P.R. China