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