1'-(2-methoxyethyl)-3',3'-dimethylspiro[benzo[f][1,4]benzoxazine-3,2'-indole]-9-ol   、                                                                                      
2,2,5,5-Tetramethylpiperidine-1-oxyl-3-carboxylic acid                                                                                                                                                                                                                                                                                                          生成                                                 [1'-(2-methoxyethyl)-3',3'-dimethylspiro[benzo[f][1,4]benzoxazine-3,2'-indole]-9-yl] 2,2,5,5-tetramethyl-1-oxopyrrolidin-1-ium-3-carboxylate