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