2-(1-Oxyl-2,5-dihydro-2,2,5,5-tetramethyl-1H-pyrrol-3-yl)-5-(β-D-2,3,4,6-tetra-O-acetyl-glucopyranosyloxy)chromen-4-one radical                                                                                                                                                              在
                                                                                                                                                                                 
sodium methylate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 1.0h,
                                                                                                                以41%的产率得到2-(1-Oxyl-2,5-dihydro-2,2,5,5-tetramethyl-1H-pyrrol-3-yl)-5-(β-D-glucopyranosyloxy)chromen-4-one radical