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