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