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