2-(8-difluoromethoxy-2,2-dimethyl-2H-chromen-5-yl)-3-methyl-1,5-bis(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-one 、
2-(3-cyclopropoxy-4-difluoromethoxyphenyl)-3-methyl-1,5-bis(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo-[2,3-d]pyridazin-4-one 以whereby 163 mg of the title compound was obtained as a white solid的产率得到2-(8-difluoromethoxy-2,2-dimethyl-2H-chromen-5-yl)-3-methyl-5-(2-trimethylsilylethoxymethyl)-1,5-dihydropyrrolo[2,3-d]pyridazin-4-one