1,2-Dihydro-pyridazin 、
N,N-二甲基-1,3-二氨基丙烷 、 8-Benzoyl-5-phenyloxy-8H-pyrazolo[4',3':5,6]pyrido[3,4-e][1,2,4-]triazolo[1,5-a]pyrimidine 以8-ethyl-5-(dihydropyridazin-1-yl)-8H-pyrazolo[4',3':5,6]pyrido[3,4-e]-[1,2,4]triazolo[1,5-a]pyrimidine is obtained的产率得到8-ethyl-5-(dihydropyridazin-1-yl)-8H-pyrazolo[4',3':5,6]pyrido[3,4-e]-[1,2,4]triazolo[1,5-a]pyrimidine