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