tert-butyl ((2S)-1-((5-amino-4-hydroxypyridin-2-yl)oxy)propan-2-yl)carbamate 、
4-(((1R)-2,2-difluorocyclopropyl)methoxy)benzoic acid 以in the same manner as in Step D of Example 83, the title compound was obtained的产率得到2-(((2S)-2-((tert-butoxycarbonyl)amino)propyl)oxy)-5-((4-(((1R)-2,2-difluorocyclopropyl)methoxy)benzoyl)amino)pyridin-4-yl 4-(((1R)-2,2-difluorocyclopropyl)methoxy)benzoate