乙酸酐   、                                                                                      
Benzyl-O--(2-->3)-O-(2-acetamido-2-desoxy-4,6-O-ethyliden-β-D-glucopyranosyl)-(1-->6)-3-O-benzyl-2-(benzyloxycarbonyl)amino-2-desoxy-α-D-glucopyranosid                                                                                                                                                              在
                                                                                                                                                                                 
sodium acetate                                                                                                                                  作用下,
                                                                                                                                                                                        反应 120.0h,
                                                                                                                以22%的产率得到Benzyl-O-<(4,5,8-tri-O-acetyl-3-desoxy-α-D-manno-2-octulopyranosyl)ono-1,7-lacton>-(2->3)-O-(2-acetamido-2-desoxy-4,6-O-ethyliden-β-D-glucopyranosyl)-(1->6)-4-O-acetyl-3-O-benzyl-2-(benzyloxycarbonyl)amino-2-desoxy-α-D-glucopyranosid