Benzoic acid (4aR,6S,8R,8aS)-7-[1-ethoxycarbonyl-meth-(E)-ylidene]-6-methoxy-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxin-8-yl ester                                                                                                                                                              在
                                                                                                                                                                                 
吡啶   、                                                                                                  lithium aluminium tetrahydride                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醚                                                                                  为溶剂,
                                                                                                                                                    反应 30.0h,
                                                                                                                生成                                                 Acetic acid (4aR,6S,8R,8aS)-7-[2-acetoxy-eth-(E)-ylidene]-6-methoxy-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxin-8-yl ester