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