methyl (2R,6R)-6-[[(2R,6S)-2-methoxycarbonyl-4-methyl-3,6-dihydro-2H-pyran-6-yl]methyl]-4-methyl-3,6-dihydro-2H-pyran-2-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 
二异丁基氢化铝                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醚                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 [(2R,6R)-6-((2S,6R)-6-Hydroxymethyl-4-methyl-5,6-dihydro-2H-pyran-2-ylmethyl)-4-methyl-3,6-dihydro-2H-pyran-2-yl]-methanol