Acetic acid (5S,7R,8S,9S,10R)-8,9-diacetoxy-7-acetoxymethyl-3-(4-methoxy-phenyl)-1,6-dioxa-4-thia-2-aza-spiro[4.5]dec-2-en-10-yl ester                                                                                                                                                              在
                                                                                                                                                                                 
sodium methylate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 0.33h,
                                                                                                                以58%的产率得到(5S,7R,8R,9S,10R)-7-Hydroxymethyl-3-(4-methoxy-phenyl)-1,6-dioxa-4-thia-2-aza-spiro[4.5]dec-2-ene-8,9,10-triol