Ethyl 5-fluoro-4-nitro-3-(trifluoromethoxy)pyridine-2-acetate
4-Fluoro-6-nitro-2-(trifluoromethoxy)pyridine-3-acetic acid
4-Fluoro-2-nitro-5-(trifluoromethoxy)pyridine-3-acetic acid
2-Fluoro-3-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-4-carboxylic acid