(1S,3'R,4'S,5'R,6'R)-5'-hydroxy-6'-(hydroxymethyl)-3',5,7-tris(methoxymethoxy)-3',4',5',6'-tetrahydro-3H-spiro[isobenzofuran-1,2'-pyran]-4'-yl (2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohex-1-en-1-yl)nona-2,4,6,8-tetraenoate                                                                                                                                                              在
                                                                                                                                                                                 Dowex                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 20.0h,
                                                                                                                以7%的产率得到(1S,3'R,4'S,5'R,6'R)-3',5,5',7-tetrahydroxy-6'-(hydroxymethyl)-3',4',5',6'-tetrahydro-3H-spiro[isobenzofuran-1,2'-pyran]-4'-yl (2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohex-1-en-1-yl)nona-2,4,6,8-tetraenoate