6-(cyclopropylmethoxy)-5-(3,3-difluoroazetidin-1-yl)pyridine-2-carboxylic acid 、
(±)-5-azaspiro[2.4]heptane-6-carboxamide hydrochloride 以to obtain the title compound (16 mg, 56%) as colorless liquid, MS (EI)的产率得到5-[6-(cyclopropylmethoxy)-5-(3,3-difluoroazetidin-1-yl)pyridine-2-carbonyl]-5-azaspiro[2.4]heptane-6-carboxamide