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