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