Methyl 5-(difluoromethyl)-3-hydroxy-4-methoxypyridine-2-carboxylate
4-(Bromomethyl)-5-(difluoromethyl)-3-hydroxy-2-methylpyridine
6-(Bromomethyl)-3-(difluoromethyl)-4-hydroxy-2-nitropyridine
2-(Difluoromethyl)-5-hydroxy-3-nitropyridine-4-sulfonyl chloride