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