Methyl 2-methyl-6-nitro-3-(trifluoromethoxy)pyridine-4-acetate
4-(Difluoromethyl)-6-nitro-3-(trifluoromethoxy)pyridine-2-methanol
4-(Difluoromethyl)-2-nitro-3-(trifluoromethoxy)pyridine-5-methanol
5-(Difluoromethyl)-3-nitro-4-(trifluoromethoxy)pyridine-2-methanol