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