[(2S,3R,4R,5R,6R)-5-Acetoxy-6-acetoxymethyl-3-acetylamino-4-((2R,3R,4S,5S,6R)-3,4,5-triacetoxy-6-acetoxymethyl-tetrahydro-pyran-2-yloxy)-tetrahydro-pyran-2-yloxy]-acetic acid   、                                                                                      
氯甲酸异丁酯                                                                                                                                                              在
                                                                                                                                                                                 
N-甲基吗啉                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                    反应 0.33h,
                                                                                                                生成                                                 Acetic acid (2R,3R,4R,5R,6S)-2-acetoxymethyl-5-acetylamino-6-(2-isobutoxycarbonyloxy-2-oxo-ethoxy)-4-((2R,3R,4S,5S,6R)-3,4,5-triacetoxy-6-acetoxymethyl-tetrahydro-pyran-2-yloxy)-tetrahydro-pyran-3-yl ester