Ethyl 6-bromo-4-(difluoromethyl)-3-nitropyridine-2-acetate
3-(Aminomethyl)-4-bromo-6-(difluoromethyl)pyridine-2-carboxylic acid
Ethyl 2-bromo-4-(difluoromethyl)-3-nitropyridine-6-acetate
3-(Aminomethyl)-4-bromo-5-(difluoromethyl)pyridine-2-carboxylic acid