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