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