4-(benzyloxycarbonylamino)-N-{tris[13-hydroxy-2,6,10-trioxatridecyl]methyl}butyramide   、                                                                                      
ethyl 3,4,6-tri-O-acetyl-2-deoxy-1-thio-2-(2,2,2-trichloroethoxycarbonylamino)-β-D-galactopyranoside                                                                                                                                                              在
                                                                                                                                                                                 
DMTST                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 72.0h,
                                                                                                                以91%的产率得到N-(tris{13-[3,4,6-tri-O-acetyl-2-deoxy-2-(2,2,2-trichloroethoxycarbonylamino)-β-D-galactopyranosyloxy]-2,6,10-trioxatridecyl}methyl)-4-(benzyloxycarbonylamino)butyramide