methyl thiophene-2-carbimidothioate hydroiodide 、 1-[(3,4-dihydro-6-hydroxy-2,5,7,8-tetramethyl-2H-[1]-benzopyran-2-yl)carbonyl]-3-aminophenoxy-azetidine 以56%的产率得到1-[(3,4-dihydro-6-hydroxy-2,5,7,8-tetramethyl-2H-[1]-benzopyran-2-yl)carbonyl]-3-{4-[(imino(2-thienyl)methyl)amino]-phenoxy}azetidine Hydrochloride