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