5-Bromo-2-(difluoromethyl)-3-nitropyridine-6-sulfonamide
4-Bromo-5-(difluoromethyl)-2-nitropyridine-3-sulfonamide
6-(Aminomethyl)-3-bromo-2-(difluoromethyl)pyridine-4-carboxylic acid
2-(Aminomethyl)-5-bromo-4-(difluoromethyl)pyridine-3-carboxylic acid