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