Ethyl 3-methyl-6-nitro-4-(trifluoromethoxy)pyridine-2-acetate
Methyl 4-(difluoromethyl)-3-nitro-2-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 5-methyl-2-nitro-3-(trifluoromethoxy)pyridine-4-acetate
Ethyl 4-methyl-5-nitro-3-(trifluoromethoxy)pyridine-2-acetate