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