Ethyl 3-(difluoromethyl)-4-hydroxy-2-methoxypyridine-6-carboxylate
Ethyl 2-(difluoromethyl)-5-hydroxy-6-iodopyridine-3-carboxylate
Methyl 2-(difluoromethyl)-3-hydroxy-6-methoxypyridine-4-acetate
Methyl 3-(difluoromethyl)-5-hydroxy-4-iodopyridine-2-carboxylate