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