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