2-Amino-5-(chloromethyl)-4-(difluoromethyl)pyridine-3-carboxaldehyde
3-Amino-5-(chloromethyl)-2-(difluoromethyl)pyridine-4-carboxaldehyde
4-Amino-6-(aminomethyl)-3-(difluoromethyl)pyridine-2-carboxylic acid
3-Amino-6-(aminomethyl)-4-(difluoromethyl)-2-(trifluoromethyl)pyridine