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