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