4-Amino-5-(difluoromethyl)-2-nitropyridine-3-carboxylic acid
Ethyl 3-amino-6-(bromomethyl)-2-(difluoromethyl)pyridine-4-acetate
Methyl 5-amino-3-(difluoromethyl)-4-nitropyridine-2-acetate
Ethyl 5-amino-2-(bromomethyl)-4-(difluoromethyl)pyridine-3-acetate