6-(Bromomethyl)-3-(difluoromethyl)-4-hydroxy-2-nitropyridine
2-(Difluoromethyl)-5-hydroxy-3-nitropyridine-4-sulfonyl chloride
Ethyl 4-(difluoromethyl)-2-hydroxy-6-methoxypyridine-3-carboxylate
4-(Difluoromethyl)-5-hydroxy-2-methyl-3-(trifluoromethyl)pyridine