(2R,3R,4S,5R)-2-((R)-2,2-Dimethyl-[1,3]dioxolan-4-ylmethoxy)-5-hydroxymethyl-tetrahydro-furan-3,4-diol   、                                                                                      (2'R)-2',3'-isopropylidenedioxypropyl-tri-O-benzoyl-β-D-ribofuranoside                                                                                                                                                              在
                                                                                                                                                                                 Amberlite IRA-410 resin   、                                                                                                  
丙酮                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 
(S)-2',3'-isopropylidenedioxypropyl 2,3-O-isopropylidene-β-D-ribofuranoside