ethyl 6-chloro-2,5-dimethylpyrazolo[1,5-a]pyrido[3,2-e]pyrimidine-7-carboxylate 、
哌啶 以2,5-dimethyl-6-(1-piperidinyl)-pyrazolo[1,5-a]pyrido[3,2-e]pyrimidine-7-carboxylic acid, ethyl ester is obtained的产率得到2,5-dimethyl-6-piperidin-1-yl-pyrazolo[1,5-
a]pyrido[3,2-
e]pyrimidine-7-carboxylic acid ethyl ester