(R)-2-((S)-2-{[(2S,4R,5R,6R)-6-((R)-1,2-Dihydroxy-ethyl)-4,5-dihydroxy-tetrahydro-pyran-2-carbonyl]-amino}-propionylamino)-pentanedioic acid dibenzyl ester                                                                                                                                                              在
                                                                                                                                         
钯                                                                                                                                                                                                                               氢气                                                                                                                                  作用下,
                                                                                                                                                                                                                            以93%的产率得到(R)-2-((S)-2-{[(2S,4R,5R,6R)-6-((R)-1,2-Dihydroxy-ethyl)-4,5-dihydroxy-tetrahydro-pyran-2-carbonyl]-amino}-propionylamino)-pentanedioic acid