6-(cyclopropylmethoxy)-5-(3,3-difluoroazetidin-1-yl)pyridine-2-carboxylic acid 、
(2S,4r)-4-氟吡咯烷-2-羧酰胺盐酸盐 以to obtain the title compound (17 mg, 49%) as white solid的产率得到(2S,4R)-1-[6-(cyclopropylmethoxy)-5-(3,3-difluoroazetidin-1-yl)pyridine-2-carbonyl]-4-fluoropyrrolidine-2-carboxamide