(4R,4aR,7R,7aR,12bS)-3-(cyclopropylmethyl)-9-methoxy-2,4,4a,5,6,7,7a,13-octahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinolin-7-ol                                                                                                                                                              在
                                                                                                                                                                                 
三溴化硼                                                                                                                                  作用下,
                                                                                                                                                                                                                            以51%的产率得到(4R,4aR,7R,7aR,12bS)-3-(cyclopropylmethyl)-2,4,4a,5,6,7,7a,13-octahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinoline-7,9-diol