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