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