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