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