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