Methyl 3-hydroxy-2-nitro-4-(trifluoromethoxy)pyridine-6-acetate
3-Hydroxy-6-nitro-2-(trifluoromethoxy)pyridine-5-acetic acid
3-Fluoro-5-(fluoromethyl)-2-(trifluoromethoxy)pyridine-6-carboxylic acid
6-Fluoro-3-(fluoromethyl)-2-(trifluoromethoxy)pyridine-4-carboxylic acid