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