4-(Chloromethyl)-3-(difluoromethyl)-2-methylpyridine-5-carboxaldehyde
4-(Chloromethyl)-6-(difluoromethyl)-2-methylpyridine-3-carboxaldehyde
4-(Chloromethyl)-2-(difluoromethyl)-6-methylpyridine-3-carboxaldehyde
4-(Chloromethyl)-6-(difluoromethyl)-3-methylpyridine-2-carboxaldehyde