6-[4-((2-aminoethyl)aminocarbonylmethyl)phenyl]-4,5-dihydro-3(2H)-pyridazinone 、
1-{4-[2-(cyclobutylmethoxy)ethyl]-phenoxy}-2,3-epoxy-propane 以12%的产率得到6-[4-[2-[3-(4-(2-Cyclobutylmethoxyethyl)phenoxy)-2-hydroxypropylamino]ethylaminocarbonylmethyl]phenyl]-4,5-dihydro-3(2H)-pyridazinone-hydrochloride