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