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