(1'S,2'S,3'R,4'S)-5-[2',3'-bis(benzyloxy)-4',5'-dihydroxy-1'-(1H-indol-3-yl)-4',5'-di-O-isopropylidene-pentan-1'-yl]-2,2-dimethyl-1,3-dioxane-4,6-dione                                                                                                                                                              在
                                                                                                                                                                                 palladium 10% on activated carbon   、                                                                                                  
氢气                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙酸乙酯                                                                                  为溶剂,
                                                                                                                                                    反应 24.0h,
                                                                                                                以95%的产率得到(3S,4S,5S)-4-(1H-indol-3-yl)-2-oxo-5-[(1'S,2'S)-1',2',3'-trihydroxypropan-1'-yl]-tetrahydrofuran-3-carboxylic acid