Ethyl 3-(difluoromethyl)-4-nitro-6-(trifluoromethyl)pyridine-2-carboxylate
6-(Difluoromethyl)-4-nitro-2-(trifluoromethyl)pyridine-3-methanol
3-(Difluoromethyl)-6-nitro-2-(trifluoromethyl)pyridine-4-acetonitrile
4-(Difluoromethyl)-5-nitro-2-(trifluoromethyl)pyridine-3-acetonitrile