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