乙酸酐   、                                                                                      
3-O-Acetyl-1,6-anhydro-2-O-benzyl-4-desoxy-4-<1D-(1N,2,4/3)-(2,3,4-tri-O-acetyl-2,3,4-trihydroxy-5-cyclohexen-1-yl)-amino>-β-D-glucopyranose                                                                                                                                                              在
                                                                                                                                                                                 
三氟化硼乙醚                                                                                                                                  作用下,
                                                                                                                                                                                        反应 8.0h,
                                                                                                                生成                                                 1,3,6-Tri-O-acetyl-2-O-benzyl-4-desoxy-4-<1D-(1N,2,4/3)-(2,3,4-tri-O-acetyl-2,3,4-trihydroxy-5-cyclohexen-1-yl)amino>-β-D-glucopyranose   、                                                                                             1,3,6-Tri-O-acetyl-2-O-benzyl-4-desoxy-4-<1D-(1N,2,4/3)-(2,3,4-tri-O-acetyl-2,3,4-trihydroxy-5-cyclohexen-1-yl)amino>-α-D-glucopyranose