7-(4-amino-2-fluorophenoxy)-N',N'-dimethylthieno[3,2-b]pyridine-2-carbohydrazide 、 7-(2-fluoro-4-nitrophenoxy)-N,N',N'-trimethylthieno[3,2-b]pyridine-2-carbohydrazide 以title compound 244 was obtained in 33% yield的产率得到7-(4-amino-2-fluorophenoxy)-N,N',N'-trimethylthieno[3,2-b]pyridine-2-carbohydrazide