2-Amino-5-(bromomethyl)-6-(difluoromethyl)pyridine-3-carboxylic acid
2-Amino-6-(chloromethyl)-3-(difluoromethyl)pyridine-5-acetic acid
3-Amino-4-(bromomethyl)-6-(difluoromethyl)pyridine-2-methanol
6-Amino-4-(bromomethyl)-2-(difluoromethyl)pyridine-3-carboxylic acid