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