6-Fluoro-3-iodo-4-(trifluoromethoxy)pyridine-2-carboxylic acid
6-Fluoro-2-nitro-3-(trifluoromethoxy)pyridine-4-carboxylic acid
2-Fluoro-5-iodo-3-(trifluoromethoxy)pyridine-4-carboxylic acid
2-Fluoro-6-nitro-4-(trifluoromethoxy)pyridine-3-carboxylic acid