2-Cyano-3-hydroxy-5-(trifluoromethoxy)pyridine-6-sulfonamide
4-Cyano-5-hydroxy-3-(trifluoromethoxy)pyridine-2-sulfonyl chloride
3-Cyano-4-iodo-2-methyl-5-(trifluoromethoxy)pyridine
2-Cyano-6-iodo-3-methyl-4-(trifluoromethoxy)pyridine
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