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