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