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