1. Institute of Chinese Medicinal SciencesGuangdong Pharmaceutical University Guangzhou 510006 China
2. School of PharmacyGuangdong Pharmaceutical University Guangzhou 510006 China
3. Guangdong Metabolic Disease Research Center of Integrated Medicine Guangzhou 510006 China
4. School of Food Science and EngineeringSouth China University of Technology Guangzhou 510006 China
5. Centre for Glycobiology, Department of BiochemistryInstitute of Integrative BiologyUniversity of Liverpool Liverpool L69 7ZB UK