3-Amino-5-(aminomethyl)-4-(difluoromethyl)pyridine-2-carboxylic acid
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