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