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