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