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