2-Amino-3-(difluoromethyl)-4-(trifluoromethyl)pyridine-6-acetonitrile
5-Amino-4-(bromomethyl)-2-(difluoromethyl)pyridine-3-carboxylic acid
4-Amino-3-(chloromethyl)-2-(difluoromethyl)pyridine-6-carboxylic acid
3-Amino-4-(bromomethyl)-5-(difluoromethyl)pyridine-2-carboxylic acid