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