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