benzyl (1S,2S,3S,4S,4aR,11bS)-1,2,3,4-tetrakis(methoxymethoxy)-2,3,4,4a,6,11b-hexahydro-[1,3]dioxolo[4,5-j]phenanthridine-5(1H)-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 Dowex-50WX
2-400                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 14.0h,
                                                                                                                以80%的产率得到benzyl (1S,2S,3S,4S,4aR,11bS)-1,2,3,4-tetrahydroxy-2,3,4,4a,6,11b-hexahydro-1H-[1,3]dioxolo[4,5-j]phenanthridine-5-carboxylate