Ethyl 6-fluoro-3-(trifluoromethoxy)pyridine-2-carboxylate
Methyl 2-(fluoromethyl)-5-methyl-3-(trifluoromethoxy)pyridine-4-carboxylate
Ethyl 2-fluoro-4-(trifluoromethoxy)pyridine-6-carboxylate
Methyl 6-(fluoromethyl)-4-methyl-3-(trifluoromethoxy)pyridine-2-carboxylate