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