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