4-bromo-7,8-dihydro-19-methoxy-2,12,16-trimethyl-18,14-metheno-6H,14H-dibenzo<1,5>dioxacyclotetradecin                                                                                                                                                              在
                                                                                                                                                                                 
iron(III)-acetylacetonate   、                                                                                                  
仲丁基锂                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 meso-7,7',8,8'-tetrahydro-19,19'-dimethoxy-2,2',12,12',16,16'-hexamethyl-4,4'-bi-18,14-metheno-6H,14H-dibenzo
<1,5>dioxacyclotetradecin