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