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