3-(Bromomethyl)-6-cyano-2-(trifluoromethoxy)pyridine-5-acetonitrile
4-(Bromomethyl)-3-cyano-6-(trifluoromethoxy)pyridine-2-acetonitrile
4-(Chloromethyl)-2-cyano-3-(trifluoromethoxy)pyridine-5-carboxylic acid
5-(Chloromethyl)-3-cyano-4-(trifluoromethoxy)pyridine-2-carboxylic acid