5-Cyano-2-(difluoromethyl)-3-nitro-6-(trifluoromethoxy)pyridine
4-Cyano-3-(difluoromethyl)-6-nitro-2-(trifluoromethoxy)pyridine
4-Cyano-3-(difluoromethyl)-2-nitro-6-(trifluoromethoxy)pyridine
Ethyl 3-cyano-5-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-4-acetate