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