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