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