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