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