(2S,5S)-5-(1,3-Dioxo-1,3-dihydro-isoindol-2-yl)-2-methyl-4-oxo-6-phenyl-hexanoic acid methyl ester                                                                                                                                                              在
                                                                                                                                                                                 sodium tetrahydroborate                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 (2S,4R,5S)-4-Hydroxy-5-(2-hydroxymethyl-benzoylamino)-2-methyl-6-phenyl-hexanoic acid methyl ester   、                                                                                             (2S,4S,5S)-4-Hydroxy-5-(2-hydroxymethyl-benzoylamino)-2-methyl-6-phenyl-hexanoic acid methyl ester