(2S,3a'R,4S,4'S,5R,5a'R,6'S,8a'S,8b'S)-4'-hydroxy-3a',4,6'-tris((2-methoxyethoxy)methoxy)-5-methyldodecahydro-3'H-spiro[pyran-2,2'-thieno[3,2-g]benzofuran]-3'-one                                                                                                                                                              在
                                                                                                                                                                                 sodium formate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃   、                                                                                         
水                                                                                  为溶剂,
                                                                                                                                                                                        以92%的产率得到(2S,3a'R,4S,4'S,5R,5a'R,6'S,8a'S,8b'S)-4'-hydroxy-3a',4,6'-tris((2-methoxyethoxy)methoxy)-5-methyldodecahydro-3'H-spiro[pyran-2,2'-thieno[3,2-g]benzofuran]-3'-one