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