Methyl 2-amino-5-(chloromethyl)-3-(difluoromethyl)pyridine-4-carboxylate
Methyl 2-amino-4-(chloromethyl)-6-(difluoromethyl)pyridine-3-carboxylate
Methyl 2-amino-4-(chloromethyl)-3-(difluoromethyl)pyridine-6-carboxylate
2-Amino-5-(aminomethyl)-6-(difluoromethyl)pyridine-3-carboxylic acid