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