5-Cyano-4-hydroxy-3-nitro-2-(trifluoromethoxy)pyridine
3-(Chloromethyl)-5-cyano-2-hydroxy-4-(trifluoromethoxy)pyridine
3-Cyano-4-hydroxy-2-nitro-5-(trifluoromethoxy)pyridine
5-(Chloromethyl)-4-cyano-3-hydroxy-2-(trifluoromethoxy)pyridine
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