5-amino-4-pyridin-4-yl-pyrazole-1-carboximidic acid amide 、
5-amino-4-pyrazin-2-yl-pyrazole-1-carboximidic acid amide 以is obtained a 75% yield of 4-amino-8-(2-pyrazinyl)-pyrazolo[1,5-a][1,3,5]triazine的产率得到8-pyrazin-2-yl-pyrazolo[1,5-
a][1,3,5]triazin-4-ylamine