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