2-Nitro-5-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-4-acetonitrile
5-(Difluoromethyl)-4-nitro-3-(trifluoromethoxy)-2-(trifluoromethyl)pyridine
3-(Difluoromethyl)-4-nitro-2-(trifluoromethoxy)-6-(trifluoromethyl)pyridine
3-(Difluoromethyl)-2-nitro-6-(trifluoromethoxy)-5-(trifluoromethyl)pyridine