Methyl 3-cyano-2-hydroxy-5-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 2-cyano-5-hydroxy-4-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 2-fluoro-5-methyl-4-(trifluoromethoxy)pyridine-3-acetate
Methyl 2-cyano-4-hydroxy-5-(trifluoromethoxy)pyridine-3-carboxylate