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