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