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