Ethyl 6-(bromomethyl)-4-(difluoromethyl)-2-hydroxypyridine-3-acetate
5-(Bromomethyl)-3-(difluoromethyl)-2-hydroxy-4-nitropyridine
6-(Difluoromethyl)-3-hydroxy-2-nitro-4-(trifluoromethyl)pyridine
3-(Difluoromethyl)-4-hydroxy-6-nitropyridine-2-carbonyl chloride