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