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