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