<(2R,4aR,5aS,6R,11aS,12R,12aR)-4a,5a,6,11a,12,12a-hexahydro-6-hydroxy-5a-nitro-2-phenyl-2H,4H-<1,3>dioxino<4',5':5,6>pyrano<3,2-b><1>benzopyran-12-yl>acetat                                                                                                                                                              在
                                                                                                                                                                                 
manganese(IV) oxide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以45%的产率得到<(2R,4aR,5aR,11aS,12R,12aR)-4a,5a,6,11a,12,12a-hexahydro-5a-nitro-6-oxo-2-phenyl-2H,4H-<1,3>dioxino<4',5':5,6>pyrano<3,2-b><1>benzopyran-12-yl>acetat