3-ethoxycarbonyl-7-(2-fluoro-5-methylphenylamino)pyrazolo[1,5-a]pyrimidine-6-carboxylic acid 、
4-(3,4-二氟苯基)-哌啶盐酸盐 以the title compound (63 mg, 28%) was obtained的产率得到6-[4-(3,4-difluorophenyl)piperidine-1-carbonyl]-3-ethoxycarbonyl-7-(2-fluoro-5-methylphenylamino)pyrazolo[1,5-a]pyrimidine