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