4-Amino-2-(aminomethyl)-3-(difluoromethyl)pyridine-6-carboxylic acid
4-Amino-5-(aminomethyl)-3-(difluoromethyl)pyridine-2-methanol
4-Amino-3-(aminomethyl)-2-(difluoromethyl)pyridine-5-methanol
3-Amino-5-(aminomethyl)-6-(difluoromethyl)pyridine-2-carboxylic acid