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