Ethyl 3-amino-2-(bromomethyl)-4-(difluoromethyl)pyridine-6-carboxylate
Methyl 4-amino-6-(bromomethyl)-2-(difluoromethyl)pyridine-3-carboxylate
Methyl 4-amino-2-(bromomethyl)-5-(difluoromethyl)pyridine-3-carboxylate
Ethyl 3-amino-4-(chloromethyl)-6-(difluoromethyl)pyridine-2-carboxylate