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