Isavuconazole Impurity 27

1- (3- (4- (4-cyanophenyl) thiazol-2-yl) -2- (2,5-difluorophenyl) -2-hydroxybutyl) -4- (1- ((methyl (3- (((methylglycyl) oxy) methyl) pyridin-2-yl) carbamoyl) oxy) ethyl) -1H-1,2,4-triazol-4-ium hydrogen sulfate