5-Hydroxy-4-nitro-2-(trifluoromethoxy)pyridine-3-sulfonamide
3-Hydroxy-4-nitro-6-(trifluoromethoxy)pyridine-2-carbonyl chloride
3-Hydroxy-4-nitro-2-(trifluoromethoxy)pyridine-6-carbonyl chloride
3-Hydroxy-2-nitro-6-(trifluoromethoxy)pyridine-5-sulfonamide