4-Amino-2-(aminomethyl)-5-(difluoromethyl)pyridine-3-carboxaldehyde
2-Amino-6-(aminomethyl)-3-(difluoromethyl)pyridine-5-acetic acid
2-Amino-4-(aminomethyl)-6-(difluoromethyl)pyridine-3-acetic acid
2-Amino-5-(aminomethyl)-3-cyano-4-(difluoromethyl)pyridine