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