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