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