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