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