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