1. Shaanxi Engineering Center of Bioresource Chemistry & Sustainable Utilization, College of Science, Northwest A & F University, Yangling 712100, Shaanxi, People's Republic of China
2. Glycochemistry & Glycobiology Lab, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Pudong, Shanghai 201203, People's Republic of China