6-(cyclopropylmethoxy)-5-(3-fluorooxetan-3-yl)pyridine-2-carboxylic acid 、
4,4-二氟-L-脯氨酰胺 盐酸盐 以to give the title compound (20 mg, 54%) as colorless oil, MS (EI)的产率得到(2S)-1-[6-(cyclopropylmethoxy)-5-(3-fluorooxetan-3-yl)pyridine-2-carbonyl]-4,4-difluoropyrrolidine-2-carboxamide