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