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