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