Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation;
School of Pharmacy;
Huazhong University of Science and Technology;
Wuhan 4]0030;
China;
Institute of Brain Research;
Huazhong University of Science and Technology;
Wuhan 410030;
China;
2-deoxy; glycosides; glycosylation; stereoselective; synthesis; oligosaccharides;