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