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