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