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
Methyl 5-cyano-2-hydroxy-3-(trifluoromethoxy)pyridine-6-acetate