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