Acetic acid (2R,3R,4R,5S,6R)-2,5-diacetoxy-6-acetoxymethyl-3-((Z)-1-methyl-3-oxo-but-1-enylamino)-tetrahydro-pyran-4-yl ester                                                                                                                                                              在
                                                                                                                                                                                 
silica gel                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 72.0h,
                                                                                                                以31%的产率得到Acetic acid (2R,3S,4R,5R,6S)-3-acetoxy-2-acetoxymethyl-6-hydroxy-5-((Z)-1-methyl-3-oxo-but-1-enylamino)-tetrahydro-pyran-4-yl ester