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