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