4-Amino-2-(bromomethyl)-3-(difluoromethyl)pyridine-5-acetonitrile
3-Amino-5-(bromomethyl)-2-(difluoromethyl)pyridine-4-acetonitrile
Ethyl 4-amino-3-(difluoromethyl)-5-methoxypyridine-2-acetate
Ethyl 4-amino-2-(difluoromethyl)-5-methoxypyridine-3-acetate