Methyl 3-(difluoromethyl)-4-hydroxy-2-methoxypyridine-6-carboxylate
3-(Chloromethyl)-4-(difluoromethyl)-2-hydroxy-6-methoxypyridine
6-(Chloromethyl)-3-(difluoromethyl)-2-hydroxy-4-methoxypyridine
4-(Chloromethyl)-3-(difluoromethyl)-2-hydroxy-6-nitropyridine