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