1-[4-(2-isobutoxy-ethyl)phenoxy]-2,3-epoxypropane 、 6-[1-(2-aminoethyl)benzimidazol-5-yl]-4,5-dihydro-5-methyl-3(2H)-pyridazinone 以18%的产率得到6-[1-[2-[3-(4-(2-Isobutoxy-ethyl)-phenoxy)-2-hydroxypropylamino]ethyl]benzimidazol-5-yl]-4,5-dihydro-5-methyl-3(2H)-pyridazinone