3-Hydroxy-6-nitro-2-(trifluoromethoxy)pyridine-4-carboxylic acid
4-Hydroxy-2-nitro-5-(trifluoromethoxy)pyridine-3-carboxylic acid
2-(Chloromethyl)-4-fluoro-5-(trifluoromethoxy)pyridine-3-acetonitrile
2-(Chloromethyl)-3-fluoro-5-(trifluoromethoxy)pyridine-4-acetonitrile