6-Cyano-2-hydroxy-3-nitro-4-(trifluoromethoxy)pyridine
4-Cyano-2-hydroxy-3-(trifluoromethoxy)pyridine-6-methanol
2-Cyano-3-hydroxy-6-nitro-5-(trifluoromethoxy)pyridine
3-Cyano-4-hydroxy-2-(trifluoromethoxy)pyridine-6-methanol
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