Ethyl 5-amino-4-(chloromethyl)-3-(difluoromethyl)pyridine-2-carboxylate
2-Amino-3-(bromomethyl)-4-(difluoromethyl)pyridine-6-carboxaldehyde
4-Amino-3-(bromomethyl)-5-(difluoromethyl)pyridine-2-carboxylic acid
4-Amino-6-(bromomethyl)-2-(difluoromethyl)pyridine-3-carboxylic acid