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