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