6-(cyclopropylmethoxy)-5-(3,3-difluoroazetidin-1-yl)pyridine-2-carboxylic acid 、
3-氟-3-甲基氮杂环丁烷盐酸盐 以to obtain the title compound (6 mg, 24%) as off-white solid, MS (ESI)的产率得到[6-(cyclopropylmethoxy)-5-(3,3-difluoroazetidin-1-yl)-2-pyridyl]-(3-fluoro-3-methylazetidin-1-yl)methanone