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