乙酸酐   、                                                                                      
4,6-diacetamino-4,6-dideoxy-α-D-galactopyranosyl α-D-glucopyranoside                                                                                                                                                              在
                                                                                                                                                                                 
吡啶                                                                                                                                  作用下,
                                                                                                                                                                                                                            以50%的产率得到Acetic acid (2R,3R,4S,5R,6R)-4,5-diacetoxy-6-acetoxymethyl-2-[(2R,3R,4S,5S,6R)-3,4-diacetoxy-5-acetylamino-6-(acetylamino-methyl)-tetrahydro-pyran-2-yloxy]-tetrahydro-pyran-3-yl ester