4-Hydroxy-6-nitro-3-(trifluoromethoxy)pyridine-2-sulfonyl chloride
Methyl 3-fluoro-6-(fluoromethyl)-2-(trifluoromethoxy)pyridine-4-carboxylate
3-Hydroxy-2-nitro-5-(trifluoromethoxy)pyridine-6-sulfonyl chloride
2-Hydroxy-6-nitro-3-(trifluoromethoxy)pyridine-4-sulfonyl chloride