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