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