2-(Difluoromethyl)-3-hydroxy-4-nitropyridine-5-acetic acid
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