3-Chloro-2-(3-cyclopropylmethoxy-4-methoxyphenyl)-1-(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-one 、
3-chloro-2-(3-cyclobutoxy-4-difluoromethoxyphenyl)-1-(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]-pyridazin-4-one 以whereby 134 mg of the title compound was obtained as a white solid的产率得到3-Chloro-2-(3-cyclopropylmethoxy-4-methoxyphenyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-one