1-allyl-1-[2-(N-cyclobutylmethylamino)ethyl]-2,2-ethylenedioxy-7-methoxy-1,2,3,4-tetrahydronaphthalene   、                                                                                      
盐酸                                                                                                                                                                                              以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                                                        以afforded 27.5 g (98%) IIf identical with the material obtained in Example 40(a) above的产率得到9b-Allyl-3-cyclobutylmethyl-8-methoxy-5,9b-dihydrobenz
indolin