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