乙酸酐   、                                                                                      
p-nitrophenyl (β-D-glucopyranosyl)-(1->3)-(β-D-glucopyranosyl)-(1->3)-(β-D-glucopyranosyl)-(1->4)-β-D-glucopyranoside                                                                                                                                                              在
                                                                                                                                                                                 
吡啶   、                                                                                                  
4-二甲氨基吡啶                                                                                                                                  作用下,
                                                                                                                                                                                        反应 12.0h,
                                                                                                                生成                                                 p-nitrophenyl (2,3,4,6-tetra-O-acetyl-β-D-glucopyranosyl)-(1->3)-(2,4,6-tri-O-acetyl-β-D-glucopyranosyl)-(1->3)-(2,4,6-tri-O-acetyl-β-D-glucopyranosyl)-(1->4)-2,3,6-tri-O-acetyl-β-D-glucopyranoside