6-(cyclopropylmethoxy)-5-(3,3-difluoroazetidin-1-yl)pyridine-2-carboxylic acid 、
3-环丙基-3-氟氮杂环丁烷盐酸盐 以to obtain the title compound (8 mg, 30%) as colorless liquid, MS (ESI)的产率得到(3-cyclopropyl-3-fluoroazetidin-1-yl)-[6-(cyclopropylmethoxy)-5-(3,3-difluoroazetidin-1-yl)pyridin-2-yl]methanone