(2S,3S,4S,5R,6S)-4,5-Diacetoxy-6-[(2S,3R,4S,5R)-4,5-diacetoxy-2-(4-nitro-phenoxy)-tetrahydro-pyran-3-yloxy]-3-methoxy-tetrahydro-pyran-2-carboxylic acid methyl ester                                                                                                                                                              在
                                                                                                                                                                                 
sodium methylate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 2.0h,
                                                                                                                以89%的产率得到(2S,3S,4R,5R,6S)-6-[(2S,3R,4S,5R)-4,5-Dihydroxy-2-(4-nitro-phenoxy)-tetrahydro-pyran-3-yloxy]-4,5-dihydroxy-3-methoxy-tetrahydro-pyran-2-carboxylic acid methyl ester