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