methyl thiophene-2-carbimidothioate hydroiodide   、                                                                                      1-[(3,4-dihydro-6-hydroxy-2,5,7,8-tetramethyl-2H-[1]-benzopyran-2-yl)carbonyl]-4-(4-aminophenoxy)piperidine                                                                                                                                                                                                                                                                                                          以25%的产率得到1-[(3,4-dihydro-6-hydroxy-2,5,7,8-tetramethyl-2H-[1]-benzopyran-2-yl)carbonyl]-4-{4-[(imino(2-thienyl)methyl)amino]phenoxy}-piperidine Hydrochloride