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