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