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