Methyl 5-amino-4-(bromomethyl)-3-(difluoromethyl)pyridine-2-acetate
Methyl 3-amino-5-(bromomethyl)-2-(difluoromethyl)pyridine-6-acetate
Methyl 3-amino-4-(bromomethyl)-2-(difluoromethyl)pyridine-5-acetate
2-Amino-3-(bromomethyl)-5-(difluoromethyl)pyridine-6-acetic acid