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