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