Ethyl 3-(6,7,8,9-tetrahydro-5-hydroxy-1,2-dimethoxy-6-methoxyimino-5H-benzo[7]annulen-5-yl)propiolate                                                                                                                                                              在
                                                                                                                                         
platinum(IV) oxide                                                                                                                                                                                                                               氢气   、                                                                                                  
溶剂黄146                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                    反应 96.0h,
                                                                                                                以90%的产率得到Ethyl 3-(6,7,8,9-tetrahydro-5-hydroxy-1,2-dimethoxy-6-methoxyimino-5H-benzo[7]annulen-5-yl)propionate