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