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