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