6-(cyclopropylmethoxy)-5-(3,3-difluoroazetidin-1-yl)pyridine-2-carboxylic acid 、
顺式-六氢呋喃并[3,4-C]吡咯 以to obtain the title compound (22 mg, 55%) as white solid, MS (EI)的产率得到[(3aR,6aS)-1,3,3a,4,6,6a-hexahydrofuro[3,4-c]pyrrol-5-yl]-[6-(cyclopropylmethoxy)-5-(3,3-difluoroazetidin-1-yl)pyridin-2-yl]methanone