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