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