5-Hydroxy-4-nitro-2-(trifluoromethoxy)pyridine-3-sulfonyl chloride
3-Fluoro-6-nitro-4-(trifluoromethoxy)pyridine-2-carboxylic acid
5-Fluoro-2-nitro-4-(trifluoromethoxy)pyridine-3-methanol
5-Fluoro-2-nitro-3-(trifluoromethoxy)pyridine-4-carboxylic acid