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