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