Ethyl 2-cyano-4-hydroxy-3-(trifluoromethoxy)pyridine-5-carboxylate
Ethyl 4-chloro-2-methyl-3-(trifluoromethoxy)pyridine-6-carboxylate
Ethyl 2-cyano-3-hydroxy-5-(trifluoromethoxy)pyridine-6-carboxylate
Ethyl 3-chloro-5-methyl-6-(trifluoromethoxy)pyridine-2-carboxylate