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