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