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