3-Cyano-4-hydroxy-5-nitro-2-(trifluoromethoxy)pyridine
3-Cyano-2-hydroxy-5-nitro-4-(trifluoromethoxy)pyridine
4-Chloro-5-methoxy-2-(trifluoromethoxy)pyridine-3-sulfonamide
6-Cyano-3-fluoro-2-(trifluoromethoxy)pyridine-4-sulfonamide
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