Ethyl 3-chloro-4-fluoro-6-(trifluoromethoxy)pyridine-2-carboxylate
Methyl 4-bromo-2-methoxy-5-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 3-chloro-2-fluoro-6-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 5-bromo-3-methoxy-2-(trifluoromethoxy)pyridine-4-carboxylate