Methyl 6-amino-2-(aminomethyl)-3-(difluoromethyl)pyridine-4-carboxylate
4-Amino-2-(difluoromethyl)-6-methyl-3-nitropyridine
3-Amino-6-(aminomethyl)-4-(difluoromethyl)pyridine-2-carboxylic acid
4-Amino-5-(aminomethyl)-2-(difluoromethyl)pyridine-3-carboxylic acid