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