Ethyl 2-(difluoromethyl)-6-hydroxy-3-methylpyridine-4-carboxylate
Ethyl 3-(difluoromethyl)-4-hydroxy-5-nitropyridine-2-carboxylate
Methyl 2-(difluoromethyl)-3-hydroxy-4-methylpyridine-5-acetate
Methyl 6-(difluoromethyl)-4-hydroxy-2-nitropyridine-3-acetate