3-Fluoro-5-nitro-2-(trifluoromethoxy)pyridine-4-sulfonyl chloride
5-Fluoro-4-nitro-3-(trifluoromethoxy)pyridine-2-sulfonyl chloride
3-Fluoro-4-nitro-2-(trifluoromethoxy)pyridine-5-sulfonyl chloride
3-(Fluoromethyl)-2-hydroxy-4-methyl-6-(trifluoromethoxy)pyridine