乙酸酐   、                                                                                      
(2R,3R,4E)-1-<4-O-(β-D-Galactopyranosyl)-β-D-glucopyranosylthio>-2-(hexadecanoylamino)-4-octadecen-3-ol                                                                                                                                                              在
                                                                                                                                                                                 
吡啶                                                                                                                                  作用下,
                                                                                                                                                                                        反应 24.0h,
                                                                                                                以95%的产率得到(2R,3R,4E)-3-Acetoxy-1-<2,3,6-tri-O-acetyl-4-O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-β-D-glucopyranosylthio>-2-(hexadecanoylamino)-4-octadecene