Methyl 5-(bromomethyl)-2-(difluoromethyl)-3-hydroxypyridine-4-acetate
Methyl 4-(bromomethyl)-5-(difluoromethyl)-3-hydroxypyridine-2-acetate
3-(Difluoromethyl)-2-hydroxy-5-nitropyridine-4-sulfonamide
5-(Chloromethyl)-2-(difluoromethyl)-3-hydroxy-6-(trifluoromethyl)pyridine