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